diff --git a/src/shop.c b/src/shop.c
index a343bab0d3..effb638984 100644
--- a/src/shop.c
+++ b/src/shop.c
@@ -1066,7 +1066,11 @@ static void Task_BuyHowManyDialogueInit(u8 taskId)
     BuyMenuPrintItemQuantityAndPrice(taskId);
     ScheduleBgCopyTilemapToVram(0);
 
-    maxQuantity = GetMoney(&gSaveBlock1Ptr->money) / sShopData->totalCost;
+    // Avoid division by zero in-case something costs 0 pokedollars.
+    if (sShopData->totalCost == 0)
+        maxQuantity = MAX_BAG_ITEM_CAPACITY;
+    else
+        maxQuantity = GetMoney(&gSaveBlock1Ptr->money) / sShopData->totalCost;
 
     if (maxQuantity > MAX_BAG_ITEM_CAPACITY)
         sShopData->maxQuantity = MAX_BAG_ITEM_CAPACITY;