diff --git a/direct/src/showbase/PythonUtil.py b/direct/src/showbase/PythonUtil.py
index 239383c6a6..3132adf0ef 100644
--- a/direct/src/showbase/PythonUtil.py
+++ b/direct/src/showbase/PythonUtil.py
@@ -12,6 +12,7 @@ if __debug__:
 
 from direct.directutil import Verify
 
+ScalarTypes = (types.FloatType, types.IntType, types.LongType)
 
 # NOTE: ifAbsentPut has been replaced with Python's dictionary's builtin setdefault
 # before: