--- a/src/newgrf_industrytiles.cpp	Mon Mar 31 22:09:27 2008 +0000
+++ b/src/newgrf_industrytiles.cpp	Thu Apr 24 11:48:09 2008 +0000
@@ -403,6 +403,8 @@
 	IndustryGfx gfx = GetIndustryGfx(tile);
 	const IndustryTileSpec *itspec = GetIndustryTileSpec(gfx);
 
+	if (itspec->grf_prop.spritegroup == NULL) return;
+
 	NewIndustryTileResolver(&object, gfx, tile, ind);
 
 	object.callback = CBID_RANDOM_TRIGGER;