diff --git a/lib/bootstrap.py b/lib/bootstrap.py
index 5b277e9d8b2c20a618e9c2b630be9d0606a4779f..a162897e493c9809e44d707d43c1867152accc58 100644
--- a/lib/bootstrap.py
+++ b/lib/bootstrap.py
@@ -107,7 +107,7 @@ def GenerateHmacKey(file_name):
   @param file_name: Path to output file
 
   """
-  utils.WriteFile(file_name, data=utils.GenerateSecret(), mode=0400)
+  utils.WriteFile(file_name, data="%s\n" % utils.GenerateSecret(), mode=0400)
 
 
 def _InitGanetiServerSetup(master_name):