diff --git a/lib/serializer/JsonSerializeFormat.h b/lib/serializer/JsonSerializeFormat.h
index 4dd826a5c..fd1401833 100644
--- a/lib/serializer/JsonSerializeFormat.h
+++ b/lib/serializer/JsonSerializeFormat.h
@@ -11,6 +11,7 @@
 
 #include "../JsonNode.h"
 #include "../CModHandler.h"
+#include "../VCMI_Lib.h"
 
 VCMI_LIB_NAMESPACE_BEGIN