diff --git a/Strategic/Map Screen Interface Map Inventory.cpp b/Strategic/Map Screen Interface Map Inventory.cpp
index 52028d6f4..6b33e5807 100644
--- a/Strategic/Map Screen Interface Map Inventory.cpp	
+++ b/Strategic/Map Screen Interface Map Inventory.cpp	
@@ -1463,7 +1463,7 @@ void BeginInventoryPoolPtr( OBJECTTYPE *pInventorySlot )
 			fMapInventoryItem = FALSE;
 			if ( _KeyDown ( 89 )) //Lalien: sell all items of this type on Alt+Y 
 			{
-				for( UINT32 iNumber = 0 ; iNumber <  pInventoryPoolList.size() ; ++iNumber)
+				for( UINT32 iNumber = 0; iNumber < iTotalNumberOfSlots ; ++iNumber)
 				{
 					if ( pInventoryPoolList[ iNumber ].o.usItem == gItemPointer.usItem )
 					{