diff --git a/.gitignore b/.gitignore
index 990504f610..a049643aa1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -89,3 +89,6 @@ keys/
 
 # clangd language server
 .clangd/
+
+# custom clang-tidy flags, also used when using clangd language server
+.clang-tidy