diff --git a/utils/arcanist/clang-format.sh b/utils/arcanist/clang-format.sh
--- a/utils/arcanist/clang-format.sh
+++ b/utils/arcanist/clang-format.sh
@@ -36,7 +36,7 @@
 
 cleanup() {
   rc=$?
-  rm "${formatted_file}" "${original_file}"
+  rm -f "${formatted_file}" "${original_file}"
   exit ${rc}
 }
 trap 'cleanup' INT HUP QUIT TERM EXIT