diff --git a/Makefile.am b/Makefile.am
index b00a3c4..eaee2c2 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -11,3 +11,5 @@ $(pkgconfig_DATA) : config.status
 
 SUBDIRS=src test doc
 
+format:
+	clang-format -i */*.[ch]