diff --git a/core/membuffer.h b/core/membuffer.h
index 04f872010..a5f7d023d 100644
--- a/core/membuffer.h
+++ b/core/membuffer.h
@@ -45,6 +45,8 @@ extern "C" {
 #endif
 
 #include <ctype.h>
+#include <stdio.h>
+#include <stdarg.h>
 #include "units.h"
 
 struct membuffer {