diff --git a/lib/cmdlib.py b/lib/cmdlib.py
index c6ff7a081fe5c80257d7b5c042248ebe6418beec..b8a1649eaaede9e854a749863823b9dd036f44c3 100644
--- a/lib/cmdlib.py
+++ b/lib/cmdlib.py
@@ -810,6 +810,7 @@ def _CheckDiskTemplate(template):
     raise errors.OpPrereqError(msg, errors.ECODE_INVAL)
   if template == constants.DT_FILE:
     _RequireFileStorage()
+  return True
 
 
 def _CheckStorageType(storage_type):