diff --git a/tools/worlddump.py b/tools/worlddump.py
index 0f1a6a1da9..628a69f7e5 100755
--- a/tools/worlddump.py
+++ b/tools/worlddump.py
@@ -47,7 +47,7 @@ def _dump_cmd(cmd):
     print cmd
     print "-" * len(cmd)
     print
-    subprocess.Popen(cmd, shell=True)
+    Popen(cmd, shell=True)
 
 
 def _header(name):