diff --git a/source/client/src/clientMsgHandler.c b/source/client/src/clientMsgHandler.c
index 00acefb397..2f996c6ced 100644
--- a/source/client/src/clientMsgHandler.c
+++ b/source/client/src/clientMsgHandler.c
@@ -14,6 +14,7 @@
  */
 
 #include "os.h"
+#include "tdef.h"
 #include "tname.h"
 #include "clientInt.h"
 #include "clientLog.h"