diff --git a/src/newgrf_industrytiles.h b/src/newgrf_industrytiles.h
--- a/src/newgrf_industrytiles.h
+++ b/src/newgrf_industrytiles.h
@@ -21,4 +21,16 @@ void AnimateNewIndustryTile(TileIndex ti
 bool StartStopIndustryTileAnimation(TileIndex tile, IndustryAnimationTrigger iat, uint32 random = Random());
 bool StartStopIndustryTileAnimation(const Industry *ind, IndustryAnimationTrigger iat);
 
+
+enum IndustryTileTrigger {
+	/* The tile of the industry has been triggered during the tileloop. */
+	INDTILE_TRIGGER_TILE_LOOP       = 0x01,
+	/* The industry has been triggered via it's tick. */
+	INDUSTRY_TRIGGER_INDUSTRY_TICK  = 0x02,
+	/* Cargo has been delivered. */
+	INDUSTRY_TRIGGER_RECEIVED_CARGO = 0x04,
+};
+void TriggerIndustryTile(TileIndex t, IndustryTileTrigger trigger);
+void TriggerIndustry(Industry *ind, IndustryTileTrigger trigger);
+
 #endif /* NEWGRF_INDUSTRYTILES_H */