diff --git a/Library/Homebrew/cmd/update.sh b/Library/Homebrew/cmd/update.sh
index 23ab687c04..8730c8474e 100644
--- a/Library/Homebrew/cmd/update.sh
+++ b/Library/Homebrew/cmd/update.sh
@@ -268,7 +268,7 @@ EOS
     else
       if [[ -n "${UPSTREAM_TAG}" && "${UPSTREAM_BRANCH}" != "master" ]]
       then
-        git checkout --force -B "master" "origin/master" "${QUIET_ARGS[@]}"
+        git branch --force "master" "origin/master" "${QUIET_ARGS[@]}"
       fi
 
       git checkout --force -B "${UPSTREAM_BRANCH}" "${REMOTE_REF}" "${QUIET_ARGS[@]}"