diff --git a/libpri.h b/libpri.h
index c41cc17..0f8aa5c 100755
--- a/libpri.h
+++ b/libpri.h
@@ -522,6 +522,7 @@ extern int pri_sr_set_bearer(struct pri_sr *sr, int transmode, int userl1);
 extern int pri_sr_set_called(struct pri_sr *sr, char *called, int calledplan, int complete);
 extern int pri_sr_set_caller(struct pri_sr *sr, char *caller, char *callername, int callerplan, int callerpres);
 extern int pri_sr_set_redirecting(struct pri_sr *sr, char *num, int plan, int pres, int reason);
+#define PRI_USER_USER_TX
 /* Set the user user field.  Warning!  don't send binary data accross this field */
 extern void pri_sr_set_useruser(struct pri_sr *sr, char *userchars);