diff --git a/src/network/network_udp.cpp b/src/network/network_udp.cpp
--- a/src/network/network_udp.cpp
+++ b/src/network/network_udp.cpp
@@ -288,8 +288,8 @@ DEF_UDP_RECEIVE_COMMAND(Client, PACKET_U
 		struct sockaddr_in out_addr;
 
 		for (c = item->info.grfconfig; c != NULL; c = c->next) {
-			if (HASBIT(c->flags, GCF_NOT_FOUND)) item->info.compatible = false;
-			if (!HASBIT(c->flags, GCF_NOT_FOUND) || strcmp(c->name, UNKNOWN_GRF_NAME_PLACEHOLDER) != 0) continue;
+			if (c->status == GCS_NOT_FOUND) item->info.compatible = false;
+			if (c->status == GCS_NOT_FOUND || strcmp(c->name, UNKNOWN_GRF_NAME_PLACEHOLDER) != 0) continue;
 			in_request[in_request_count] = c;
 			in_request_count++;
 		}
@@ -392,7 +392,7 @@ void ClientNetworkUDPSocketHandler::Hand
 		 * already resolved name for this GRF (another server has sent the
 		 * name of the GRF already */
 		config->name     = FindUnknownGRFName(config->grfid, config->md5sum, true);
-		SETBIT(config->flags, GCF_NOT_FOUND);
+		config->status   = GCS_NOT_FOUND;
 	} else {
 		config->filename = f->filename;
 		config->name     = f->name;
diff --git a/src/newgrf.cpp b/src/newgrf.cpp
--- a/src/newgrf.cpp
+++ b/src/newgrf.cpp
@@ -2535,24 +2535,24 @@ static void SkipIf(byte *buf, int len)
 		switch (condtype) {
 			/* Tests 6 to 10 are only for param 0x88, GRFID checks */
 			case 6: /* Is GRFID active? */
-				result = HASBIT(c->flags, GCF_ACTIVATED);
+				result = c->status == GCS_ACTIVATED;
 				break;
 
 			case 7: /* Is GRFID non-active? */
-				result = !HASBIT(c->flags, GCF_ACTIVATED);
+				result = c->status != GCS_ACTIVATED;
 				break;
 
 			case 8: /* GRFID is not but will be active? */
-				result = !HASBIT(c->flags, GCF_ACTIVATED) && !HASBIT(c->flags, GCF_DISABLED);
+				result = c->status == GCS_INITIALISED;
 				break;
 
 			case 9: /* GRFID is or will be active? */
-				result = !HASBIT(c->flags, GCF_NOT_FOUND) && !HASBIT(c->flags, GCF_DISABLED);
+				result = c->status == GCS_ACTIVATED || c->status == GCS_INITIALISED;
 				break;
 
 			case 10: /* GRFID is not nor will be active */
 				/* This is the only condtype that doesn't get ignored if the GRFID is not found */
-				result = c == NULL || HASBIT(c->flags, GCF_DISABLED) || HASBIT(c->flags, GCF_NOT_FOUND);
+				result = c == NULL || c->flags == GCS_DISABLED || c->status == GCS_NOT_FOUND;
 				break;
 
 			default: grfmsg(1, "Unsupported GRF test %d. Ignoring", condtype); return;
@@ -2616,7 +2616,7 @@ static void SkipIf(byte *buf, int len)
 		_skip_sprites = -1;
 
 		/* If an action 8 hasn't been encountered yet, disable the grf. */
-		if (!HASBIT(_cur_grfconfig->flags, GCF_ACTIVATED)) SETBIT(_cur_grfconfig->flags, GCF_DISABLED);
+		if (_cur_grfconfig->status != GCS_ACTIVATED) _cur_grfconfig->status = GCS_DISABLED;
 	}
 }
 
@@ -2673,7 +2673,7 @@ static void GRFInfo(byte *buf, int len)
 
 	_cur_grffile->grfid = grfid;
 	_cur_grffile->grf_version = version;
-	SETBIT(_cur_grfconfig->flags, GCF_ACTIVATED);
+	_cur_grfconfig->status = _cur_stage < GLS_ACTIVATION ? GCS_INITIALISED : GCS_ACTIVATED;
 
 	/* Do swap the GRFID for displaying purposes since people expect that */
 	DEBUG(grf, 1, "Loaded GRFv%d set %08lX - %s", version, BSWAP32(grfid), name);
@@ -2779,8 +2779,7 @@ static void GRFLoadError(byte *buf, int 
 	} else if (severity == 3) {
 		/* This is a fatal error, so make sure the GRF is deactivated and no
 		 * more of it gets loaded. */
-		SETBIT(_cur_grfconfig->flags, GCF_DISABLED);
-		CLRBIT(_cur_grfconfig->flags, GCF_ACTIVATED);
+		_cur_grfconfig->status = GCS_DISABLED;
 
 		_skip_sprites = -1;
 	}
@@ -2981,8 +2980,7 @@ static void ParamSet(byte *buf, int len)
 								if (op != 4 && op != 5) {
 									/* Deactivate GRF */
 									grfmsg(0, "GRM: Unable to allocate %d vehicles, deactivating", count);
-									SETBIT(_cur_grfconfig->flags, GCF_DISABLED);
-									CLRBIT(_cur_grfconfig->flags, GCF_ACTIVATED);
+									_cur_grfconfig->status = GCS_DISABLED;
 
 									_skip_sprites = -1;
 									return;
@@ -3000,8 +2998,7 @@ static void ParamSet(byte *buf, int len)
 									/* Check if the allocated sprites will fit below the original sprite limit */
 									if (_cur_spriteid + count >= 16384) {
 										grfmsg(0, "GRM: Unable to allocate %d sprites; try changing NewGRF order", count);
-										SETBIT(_cur_grfconfig->flags, GCF_DISABLED);
-										CLRBIT(_cur_grfconfig->flags, GCF_ACTIVATED);
+										_cur_grfconfig->status = GCS_DISABLED;
 
 										_skip_sprites = -1;
 										return;
@@ -3218,8 +3215,7 @@ static void GRFInhibit(byte *buf, int le
 		/* Unset activation flag */
 		if (file != NULL && file != _cur_grfconfig) {
 			grfmsg(2, "GRFInhibit: Deactivating file '%s'", file->filename);
-			SETBIT(file->flags, GCF_DISABLED);
-			CLRBIT(file->flags, GCF_ACTIVATED);
+			file->status = GCS_DISABLED;
 		}
 	}
 }
@@ -3950,11 +3946,9 @@ void LoadNewGRFFile(GRFConfig *config, u
 	if (stage != GLS_FILESCAN && stage != GLS_SAFETYSCAN && stage != GLS_LABELSCAN) {
 		_cur_grffile = GetFileByFilename(filename);
 		if (_cur_grffile == NULL) error("File '%s' lost in cache.\n", filename);
-		if (stage == GLS_ACTIVATION && !HASBIT(config->flags, GCF_ACTIVATED)) return;
+		if (stage == GLS_ACTIVATION && config->status != GCS_INITIALISED) return;
 	}
 
-	if (stage == GLS_ACTIVATION) CLRBIT(config->flags, GCF_ACTIVATED);
-
 	FioOpenFile(file_index, filename);
 	_file_index = file_index; // XXX
 
@@ -4037,7 +4031,7 @@ void LoadNewGRF(uint load_index, uint fi
 		_cur_stage = stage;
 		_cur_spriteid = load_index;
 		for (c = _grfconfig; c != NULL; c = c->next) {
-			if (HASBIT(c->flags, GCF_DISABLED) || HASBIT(c->flags, GCF_NOT_FOUND)) continue;
+			if (c->status == GCS_DISABLED || c->status == GCS_NOT_FOUND) continue;
 
 			// TODO usererror()
 			if (!FioCheckFileExists(c->filename)) error("NewGRF file is missing '%s'", c->filename);
diff --git a/src/newgrf_config.cpp b/src/newgrf_config.cpp
--- a/src/newgrf_config.cpp
+++ b/src/newgrf_config.cpp
@@ -60,7 +60,7 @@ static bool CalcGRFMD5Sum(GRFConfig *con
 bool FillGRFDetails(GRFConfig *config, bool is_static)
 {
 	if (!FioCheckFileExists(config->filename)) {
-		SETBIT(config->flags, GCF_NOT_FOUND);
+		config->status = GCS_NOT_FOUND;
 		return false;
 	}
 
@@ -210,14 +210,14 @@ void ResetGRFConfig(bool defaults)
 /** Check if all GRFs in the GRF config from a savegame can be loaded.
  * @return will return any of the following 3 values:<br>
  * <ul>
- * <li> GCF_ACTIVATED: No problems occured, all GRF files were found and loaded
- * <li> GCF_COMPATIBLE: For one or more GRF's no exact match was found, but a
+ * <li> GLC_ALL_GOOD: No problems occured, all GRF files were found and loaded
+ * <li> GLC_COMPATIBLE: For one or more GRF's no exact match was found, but a
  *     compatible GRF with the same grfid was found and used instead
- * <li> GCF_NOT_FOUND: For one or more GRF's no match was found at all
+ * <li> GLC_NOT_FOUND: For one or more GRF's no match was found at all
  * </ul> */
-GCF_Flags IsGoodGRFConfigList(void)
+GRFListCompatibility IsGoodGRFConfigList(void)
 {
-	GCF_Flags res = GCF_ACTIVATED;
+	GRFListCompatibility res = GLC_ALL_GOOD;
 
 	for (GRFConfig *c = _grfconfig; c != NULL; c = c->next) {
 		const GRFConfig *f = FindGRFConfig(c->grfid, c->md5sum);
@@ -233,7 +233,7 @@ GCF_Flags IsGoodGRFConfigList(void)
 				SETBIT(c->flags, GCF_COMPATIBLE);
 
 				/* Non-found has precedence over compatibility load */
-				if (res != GCF_NOT_FOUND) res = GCF_COMPATIBLE;
+				if (res != GLC_NOT_FOUND) res = GLC_COMPATIBLE;
 				goto compatible_grf;
 			}
 
@@ -241,8 +241,8 @@ GCF_Flags IsGoodGRFConfigList(void)
 			md5sumToString(buf, lastof(buf), c->md5sum);
 			DEBUG(grf, 0, "NewGRF %08X (%s) not found; checksum %s", BSWAP32(c->grfid), c->filename, buf);
 
-			SETBIT(c->flags, GCF_NOT_FOUND);
-			res = GCF_NOT_FOUND;
+			c->status = GCS_NOT_FOUND;
+			res = GLC_NOT_FOUND;
 		} else {
 compatible_grf:
 			DEBUG(grf, 1, "Loading GRF %08X from %s", BSWAP32(f->grfid), f->filename);
diff --git a/src/newgrf_config.h b/src/newgrf_config.h
--- a/src/newgrf_config.h
+++ b/src/newgrf_config.h
@@ -7,9 +7,6 @@
 
 /* GRF config bit flags */
 typedef enum {
-	GCF_DISABLED,  ///< GRF file is disabled
-	GCF_NOT_FOUND, ///< GRF file was not found in the local cache
-	GCF_ACTIVATED, ///< GRF file is active
 	GCF_SYSTEM,    ///< GRF file is an openttd-internal system grf
 	GCF_UNSAFE,    ///< GRF file is unsafe for static usage
 	GCF_STATIC,    ///< GRF file is used statically (can be used in any MP game)
@@ -17,6 +14,20 @@ typedef enum {
 	GCF_COPY,      ///< The data is copied from a grf in _all_grfs
 } GCF_Flags;
 
+typedef enum {
+	GCS_UNKNOWN,      ///< The status of this grf file is unknown
+	GCS_DISABLED,     ///< GRF file is disabled
+	GCS_NOT_FOUND,    ///< GRF file was not found in the local cache
+	GCS_INITIALISED,  ///< GRF file has been initialised
+	GCS_ACTIVATED     ///< GRF file has been activated
+} GRFStatus;
+
+typedef enum {
+	GLC_ALL_GOOD,
+	GLC_COMPATIBLE,
+	GLC_NOT_FOUND
+} GRFListCompatibility;
+
 typedef struct GRFIdentifier {
 	uint32 grfid;
 	uint8 md5sum[16];
@@ -37,6 +48,7 @@ typedef struct GRFConfig : public GRFIde
 	GRFError *error;
 
 	uint8 flags;
+	GRFStatus status;
 	uint32 param[0x80];
 	uint8 num_params;
 
@@ -64,7 +76,7 @@ void AppendToGRFConfigList(GRFConfig **d
 void ClearGRFConfig(GRFConfig **config);
 void ClearGRFConfigList(GRFConfig **config);
 void ResetGRFConfig(bool defaults);
-GCF_Flags IsGoodGRFConfigList(void);
+GRFListCompatibility IsGoodGRFConfigList(void);
 bool FillGRFDetails(GRFConfig *config, bool is_static);
 char *GRFBuildParamList(char *dst, const GRFConfig *c, const char *last);
 
diff --git a/src/newgrf_gui.cpp b/src/newgrf_gui.cpp
--- a/src/newgrf_gui.cpp
+++ b/src/newgrf_gui.cpp
@@ -91,8 +91,8 @@ static void ShowNewGRFInfo(const GRFConf
 	}
 
 	/* Show flags */
-	if (HASBIT(c->flags, GCF_NOT_FOUND))  y += DrawStringMultiLine(x, y, STR_NEWGRF_NOT_FOUND, w);
-	if (HASBIT(c->flags, GCF_DISABLED))   y += DrawStringMultiLine(x, y, STR_NEWGRF_DISABLED, w);
+	if (c->status == GCS_NOT_FOUND)        y += DrawStringMultiLine(x, y, STR_NEWGRF_NOT_FOUND, w);
+	if (c->status == GCS_DISABLED)         y += DrawStringMultiLine(x, y, STR_NEWGRF_DISABLED, w);
 	if (HASBIT(c->flags, GCF_COMPATIBLE)) y += DrawStringMultiLine(x, y, STR_NEWGRF_COMPATIBLE_LOADED, w);
 
 	/* Draw GRF info if it exists */
@@ -335,16 +335,23 @@ static void NewGRFWndProc(Window *w, Win
 					SpriteID pal;
 
 					/* Pick a colour */
-					if (HASBIT(c->flags, GCF_NOT_FOUND) || HASBIT(c->flags, GCF_DISABLED)) {
-						pal = PALETTE_TO_RED;
-					} else if (HASBIT(c->flags, GCF_STATIC)) {
+					switch (c->status) {
+						case GCS_NOT_FOUND:
+						case GCS_DISABLED:
+							pal = PALETTE_TO_RED;
+							break;
+						case GCS_ACTIVATED:
+							pal = PALETTE_TO_GREEN;
+							break;
+						default:
+							pal = PALETTE_TO_BLUE;
+							break;
+					}
+
+					if (HASBIT(c->flags, GCF_STATIC)) {
 						pal = PALETTE_TO_GREY;
 					} else if (HASBIT(c->flags, GCF_COMPATIBLE)) {
 						pal = PALETTE_TO_ORANGE;
-					} else if (HASBIT(c->flags, GCF_ACTIVATED)) {
-						pal = PALETTE_TO_GREEN;
-					} else {
-						pal = PALETTE_TO_BLUE;
 					}
 
 					DrawSprite(SPR_SQUARE, pal, 5, y + 2);
diff --git a/src/openttd.cpp b/src/openttd.cpp
--- a/src/openttd.cpp
+++ b/src/openttd.cpp
@@ -1209,12 +1209,12 @@ bool AfterLoadGame(void)
 	if (_opt.road_side) _opt.road_side = 1;
 
 	/* Check if all NewGRFs are present, we are very strict in MP mode */
-	GCF_Flags gcf_res = IsGoodGRFConfigList();
-	if (_networking && gcf_res != GCF_ACTIVATED) return false;
+	GRFListCompatibility gcf_res = IsGoodGRFConfigList();
+	if (_networking && gcf_res != GLC_ALL_GOOD) return false;
 
 	switch (gcf_res) {
-		case GCF_COMPATIBLE: _switch_mode_errorstr = STR_NEWGRF_COMPATIBLE_LOAD_WARNING; break;
-		case GCF_NOT_FOUND: _switch_mode_errorstr = STR_NEWGRF_DISABLED_WARNING; break;
+		case GLC_COMPATIBLE: _switch_mode_errorstr = STR_NEWGRF_COMPATIBLE_LOAD_WARNING; break;
+		case GLC_NOT_FOUND: _switch_mode_errorstr = STR_NEWGRF_DISABLED_WARNING; break;
 		default: break;
 	}
 
diff --git a/src/settings.cpp b/src/settings.cpp
--- a/src/settings.cpp
+++ b/src/settings.cpp
@@ -1530,7 +1530,7 @@ static GRFConfig *GRFLoadConfig(IniFile 
 		if (!FillGRFDetails(c, is_static)) {
 			const char *msg;
 
-			if (HASBIT(c->flags, GCF_NOT_FOUND)) {
+			if (c->status == GCS_NOT_FOUND) {
 				msg = "not found";
 			} else if (HASBIT(c->flags, GCF_UNSAFE)) {
 				msg = "unsafe for static use";