diff --git a/gui/builtinContextMenus/moduleAmmoPicker.py b/gui/builtinContextMenus/moduleAmmoPicker.py
index f1023328c..13ba18f44 100644
--- a/gui/builtinContextMenus/moduleAmmoPicker.py
+++ b/gui/builtinContextMenus/moduleAmmoPicker.py
@@ -26,6 +26,9 @@ class ModuleAmmoPicker(ContextMenu):
                 validCharges = currCharges
                 self.module = mod
 
+        if validCharges is None:
+            return False
+
         self.modules = modules
         self.charges = list(validCharges)
         return len(self.charges) > 0