diff --git a/src/d/d_demo.cpp b/src/d/d_demo.cpp
index 5468abcfd..d596f895e 100644
--- a/src/d/d_demo.cpp
+++ b/src/d/d_demo.cpp
@@ -6,6 +6,7 @@
 #include "d/d_demo.h"
 #include "f_op/f_op_camera_mng.h"
 #include "d/d_com_inf_game.h"
+#include "d/d_mesg.h"
 #include "m_Do/m_Do_printf.h"
 
 /* 800692C4-80069330       .text __ct__13dDemo_actor_cFv */