diff --git a/tools/worlddump.py b/tools/worlddump.py
index 7acfb5e..0f1a6a1 100755
--- a/tools/worlddump.py
+++ b/tools/worlddump.py
@@ -23,6 +23,7 @@
 import os.path
 import sys
 
+from subprocess import Popen
 
 def get_options():
     parser = argparse.ArgumentParser(
@@ -46,7 +47,7 @@
     print cmd
     print "-" * len(cmd)
     print
-    print os.popen(cmd).read()
+    subprocess.Popen(cmd, shell=True)
 
 
 def _header(name):