diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index bbbb1d9..f9b6ee7 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -40,6 +40,7 @@ repos:
     hooks:
       - id: clang-format
         args: [-i, --Werror]
+        pass_filenames: false
       # - id: clang-tidy
       # - id: oclint
       # - id: cppcheck
diff --git a/cpp/.clang-format-ignore b/cpp/.clang-format-ignore
new file mode 100644
index 0000000..26452ed
--- /dev/null
+++ b/cpp/.clang-format-ignore
@@ -0,0 +1,2 @@
+./src/hashtable*
+./src/tables*