diff --git a/src/json.c b/src/json.c
index 01b3ed9c..4cb0d0a7 100644
--- a/src/json.c
+++ b/src/json.c
@@ -28,6 +28,7 @@
  */
 
 #include "json.h"
+#include "utils.h"
 
 #ifdef _MSC_VER
 #ifndef _CRT_SECURE_NO_WARNINGS