diff --git a/tools/ftfy.sh b/tools/ftfy.sh
index 1f41fe76b6f7cb658d2a37243ea90bf896d635fc..07be5b7a8b5fe2a20ca2deaa6263b5a99fe3b932 100755
--- a/tools/ftfy.sh
+++ b/tools/ftfy.sh
@@ -113,7 +113,7 @@ cd "$(git rev-parse --show-toplevel)"
 git show > "${ORIG_DIFF}"
 
 # Apply the style guide on new and modified files and collect its diff
-for f in $(git diff HEAD^ --name-only -M90 --diff-filter=AM
+for f in $(git diff HEAD^ --name-only -M90 --diff-filter=AM \
            | grep '\.[ch]$'); do
   case "$f" in
     third_party/*) continue;;