diff --git a/build-aux/clang-format b/build-aux/clang-format
new file mode 100755
index 0000000..8b9d07e
--- /dev/null
+++ b/build-aux/clang-format
@@ -0,0 +1,5 @@
+#!/bin/bash
+
+set -e
+
+git ls-files -z -- '*.cc' '*.hh' | xargs -0 clang-format -i