diff --git a/api/source/mk_util.cpp b/api/source/mk_util.cpp
index 872bf672..860af2a3 100644
--- a/api/source/mk_util.cpp
+++ b/api/source/mk_util.cpp
@@ -26,6 +26,7 @@
 
 #include "mk_util.h"
 #include <stdarg.h>
+#include <assert.h>
 #include "Util/logger.h"
 using namespace std;
 using namespace toolkit;