diff --git a/taskcluster/scripts/misc/build-clang-tidy-external.sh b/taskcluster/scripts/misc/build-clang-tidy-external.sh
index 8647432e7c73..d6320175feed 100755
--- a/taskcluster/scripts/misc/build-clang-tidy-external.sh
+++ b/taskcluster/scripts/misc/build-clang-tidy-external.sh
@@ -7,5 +7,5 @@ rm -rf $GECKO_PATH/build/clang-plugin/external/*
 # Move external repository into its place
 cp -r $MOZ_FETCHES_DIR/civet.git/* $GECKO_PATH/build/clang-plugin/external
 
-# Call build-clang.sh with this script's first argument (our JSON config)
-$GECKO_PATH/taskcluster/scripts/misc/build-clang.sh $1
+# Call build-clang.sh with this script's arguments
+$GECKO_PATH/taskcluster/scripts/misc/build-clang.sh "$@"