diff --git a/module/Makefile b/module/Makefile
index 6994666..72b5fc1 100644
--- a/module/Makefile
+++ b/module/Makefile
@@ -18,3 +18,6 @@ clean:
 	rm -fr .tmp_versions
 
 netatop.o:	../netatop.h	../netatopversion.h
+
+# clang
+ccflags-y += -Wno-strict-prototypes