diff --git a/gui/builtinContextMenus/amount.py b/gui/builtinContextMenus/amount.py
index 74f62481b..6484595eb 100644
--- a/gui/builtinContextMenus/amount.py
+++ b/gui/builtinContextMenus/amount.py
@@ -26,7 +26,6 @@ class ChangeAmount(ContextMenu):
         return u"Change {0} Quantity".format(itmContext)
 
     def activate(self, fullContext, selection, i):
-        srcContext = fullContext[0]
         thing = selection[0]
         mainFrame = gui.mainFrame.MainFrame.getInstance()
         fitID = mainFrame.getActiveFit()