diff --git a/PC/python_nt.def b/PC/python_nt.def
index 8f23848493b..95fe22f6222 100644
--- a/PC/python_nt.def
+++ b/PC/python_nt.def
@@ -103,6 +103,7 @@ EXPORTS
 	PyErr_Format
 	PyErr_GivenExceptionMatches
 	PyErr_NewException
+	PyErr_NormalizeException
 	PyErr_NoMemory
 	PyErr_Occurred
 	PyErr_Print