diff --git a/InvenTree/stock/api.py b/InvenTree/stock/api.py
index 0bd048087e..9f305b657a 100644
--- a/InvenTree/stock/api.py
+++ b/InvenTree/stock/api.py
@@ -178,7 +178,11 @@ class StockMove(APIView):
         for item in stock_list:
             try:
                 stock_id = int(item['pk'])
-                quantity = int(item['quantity'])
+                if 'quantity' in item:
+                    quantity = int(item['quantity'])
+                else:
+                    # If quantity not supplied, we'll move the entire stock
+                    quantity = None
             except ValueError:
                 # Ignore this one
                 continue
@@ -192,6 +196,9 @@ class StockMove(APIView):
             except StockItem.DoesNotExist:
                 continue
 
+            if quantity is None:
+                quantity = stock.quantity
+
             stock.move(location, data.get('notes'), request.user, quantity=quantity)
 
         return Response({'success': 'Moved parts to {loc}'.format(