diff --git a/src/newgrf.cpp b/src/newgrf.cpp
--- a/src/newgrf.cpp
+++ b/src/newgrf.cpp
@@ -3925,7 +3925,7 @@ static void TownHouseMapSpriteGroup(Byte
 			continue;
 		}
 
-		hs->grf_prop.spritegroup = _cur_grffile->spritegroups[groupid];
+		hs->grf_prop.spritegroup[0] = _cur_grffile->spritegroups[groupid];
 	}
 }
 
@@ -3956,7 +3956,7 @@ static void IndustryMapSpriteGroup(ByteR
 			continue;
 		}
 
-		indsp->grf_prop.spritegroup = _cur_grffile->spritegroups[groupid];
+		indsp->grf_prop.spritegroup[0] = _cur_grffile->spritegroups[groupid];
 	}
 }
 
@@ -3987,7 +3987,7 @@ static void IndustrytileMapSpriteGroup(B
 			continue;
 		}
 
-		indtsp->grf_prop.spritegroup = _cur_grffile->spritegroups[groupid];
+		indtsp->grf_prop.spritegroup[0] = _cur_grffile->spritegroups[groupid];
 	}
 }
 
@@ -4075,7 +4075,7 @@ static void AirportMapSpriteGroup(ByteRe
 			continue;
 		}
 
-		as->grf_prop.spritegroup = _cur_grffile->spritegroups[groupid];
+		as->grf_prop.spritegroup[0] = _cur_grffile->spritegroups[groupid];
 	}
 }
 
@@ -4106,7 +4106,7 @@ static void AirportTileMapSpriteGroup(By
 			continue;
 		}
 
-		airtsp->grf_prop.spritegroup = _cur_grffile->spritegroups[groupid];
+		airtsp->grf_prop.spritegroup[0] = _cur_grffile->spritegroups[groupid];
 	}
 }