diff --git a/devutils/update_lists.py b/devutils/update_lists.py
index 5ea0a72f..549d8b8e 100755
--- a/devutils/update_lists.py
+++ b/devutils/update_lists.py
@@ -404,5 +404,6 @@ def main(args_list=None):
 
 
 if __name__ == "__main__":
-    multiprocessing.set_start_method('fork')
+    if os.name == 'posix':
+        multiprocessing.set_start_method('fork')
     main()