diff --git a/pre-commit.sh b/pre-commit.sh
index 6018062..0b841d6 100755
--- a/pre-commit.sh
+++ b/pre-commit.sh
@@ -8,7 +8,7 @@ set -e
 # format
 
 make format
-git diff --name-only --cached | xargs -l git add
+git diff --name-only --cached --diff-filter=d | xargs -l git add
 # build 
 
 make build