diff --git a/src/economy.cpp b/src/economy.cpp
--- a/src/economy.cpp
+++ b/src/economy.cpp
@@ -1042,6 +1042,8 @@ static uint DeliverGoodsToIndustry(const
 		/* Check if industry temporarily refuses acceptance */
 		if (IndustryTemporarilyRefusesCargo(ind, cargo_type)) continue;
 
+		if (ind->exclusive_supplier != INVALID_OWNER && ind->exclusive_supplier != st->owner) continue;
+
 		/* Insert the industry into _cargo_delivery_destinations, if not yet contained */
 		include(_cargo_delivery_destinations, ind);