diff --git a/core/smn_protobuf.cpp b/core/smn_protobuf.cpp
index 39f25c9b..b282bd40 100644
--- a/core/smn_protobuf.cpp
+++ b/core/smn_protobuf.cpp
@@ -30,6 +30,7 @@
  */
 
 #include "logic_bridge.h"
+#include "UserMessages.h"
 #include "UserMessagePBHelpers.h"
 #include "smn_usermsgs.h"