diff --git a/tools/fetch-rebase-pull-request b/tools/fetch-rebase-pull-request
index ab3fec34f6..34b6d79cf3 100755
--- a/tools/fetch-rebase-pull-request
+++ b/tools/fetch-rebase-pull-request
@@ -12,6 +12,6 @@ fi
 request_id="$1"
 remote=${2:-"upstream"}
 git fetch "$remote" "pull/$request_id/head"
-git checkout -B "review-${request_id}" $remote/master
+git checkout -B "review-${request_id}" "$remote/master"
 git reset --hard FETCH_HEAD
 git pull --rebase