diff --git a/src/newgrf_industries.cpp b/src/newgrf_industries.cpp
--- a/src/newgrf_industries.cpp
+++ b/src/newgrf_industries.cpp
@@ -535,19 +535,3 @@ void IndustryProductionCallback(Industry
 
 	InvalidateWindow(WC_INDUSTRY_VIEW, ind->index);
 }
-
-void DoTriggerIndustry(Industry *ind, IndustryTileTrigger trigger)
-{
-	ResolverObject object;
-
-	NewIndustryResolver(&object, ind->xy, ind);
-	object.callback = CBID_RANDOM_TRIGGER;
-	object.trigger = trigger;
-
-	const SpriteGroup *group = Resolve(GetIndustrySpec(ind->type)->grf_prop.spritegroup, &object);
-	if (group == NULL) return;
-
-	byte new_random_bits = Random();
-	ind->random &= ~object.reseed;
-	ind->random |= new_random_bits & object.reseed;
-}
diff --git a/src/newgrf_industrytiles.cpp b/src/newgrf_industrytiles.cpp
--- a/src/newgrf_industrytiles.cpp
+++ b/src/newgrf_industrytiles.cpp
@@ -413,8 +413,6 @@ void TriggerIndustryTile(TileIndex tile,
 	DoTriggerIndustryTile(tile, trigger, GetIndustryByTile(tile));
 }
 
-extern void DoTriggerIndustry(Industry *ind, IndustryTileTrigger trigger);
-
 void TriggerIndustry(Industry *ind, IndustryTileTrigger trigger)
 {
 	BEGIN_TILE_LOOP(tile, ind->width, ind->height, ind->xy)
@@ -422,6 +420,4 @@ void TriggerIndustry(Industry *ind, Indu
 			DoTriggerIndustryTile(tile, trigger, ind);
 		}
 	END_TILE_LOOP(tile, ind->width, ind->height, ind->xy)
-
-	DoTriggerIndustry(ind, trigger);
 }