diff --git a/contrib/devtools/chainparams/make_chainparams.py b/contrib/devtools/chainparams/make_chainparams.py
--- a/contrib/devtools/chainparams/make_chainparams.py
+++ b/contrib/devtools/chainparams/make_chainparams.py
@@ -57,7 +57,7 @@
 
 def main(args):
     (chainwork, blockhash) = get_chainparams(args['rpc'], args['block'])
-    output = "{}\n{}\n".format(blockhash, chainwork)
+    output = "{}\n{}".format(blockhash, chainwork)
     return output