diff --git a/lib/commit.js b/lib/commit.js
index <HASH>..<HASH> 100644
--- a/lib/commit.js
+++ b/lib/commit.js
@@ -146,7 +146,7 @@ Commit.prototype.amendWithSignature = function(
         );
       })
       .then(function(commitContentResult) {
-        commitContent = commitContentResult + "\n";
+        commitContent = commitContentResult;
         return onSignature(commitContent);
       })
       .then(function(signature) {
Do not append an additional newline to `amend` commit buffers