diff --git a/wally/start_vms.py b/wally/start_vms.py
index 432594a..9da66f4 100644
--- a/wally/start_vms.py
+++ b/wally/start_vms.py
@@ -118,7 +118,7 @@
     spath = os.path.dirname(os.path.dirname(wally.__file__))
     spath = os.path.join(spath, 'scripts/prepare.sh')
 
-    cmd = "bash {spath} >/dev/null 2>&1 ".format(spath=spath)
+    cmd = "bash {spath} >/dev/null 2>&1".format(spath=spath)
     subprocess.check_call(cmd, shell=True, env=env)
 
     while True: