diff --git a/release/scripts/startup/bl_ui/space_userpref_keymap.py b/release/scripts/startup/bl_ui/space_userpref_keymap.py
index 8fed3a934d9..585c3cffcb9 100644
--- a/release/scripts/startup/bl_ui/space_userpref_keymap.py
+++ b/release/scripts/startup/bl_ui/space_userpref_keymap.py
@@ -592,6 +592,9 @@ class WM_OT_keyconfig_export(bpy.types.Operator):
         if not self.filepath:
             raise Exception("Filepath not set")
 
+        if not self.filepath.endswith('.py'):
+            self.filepath += '.py'
+
         f = open(self.filepath, "w")
         if not f:
             raise Exception("Could not open file")