diff --git a/src/util/git.js b/src/util/git.js
index 6d6f730..fdde39d 100644
--- a/src/util/git.js
+++ b/src/util/git.js
@@ -41,7 +41,7 @@ const spawnGitCommand = pify((args, cb) => {
   git.stderr.on('data', (buf) => bufs.push(buf));
   git.on('close', (code) => {
     if (code) {
-      const msg = Buffer.concat(bufs).toString() || `git ${args.join('')} - exit code: ${code}`;
+      const msg = Buffer.concat(bufs).toString() || `git ${args.join(' ')} - exit code: ${code}`;
       cb(new Error(msg));
     } else {
       cb(null);