diff --git a/src/modules/m_mode.c b/src/modules/m_mode.c
index 0987d69ca..d25a01321 100644
--- a/src/modules/m_mode.c
+++ b/src/modules/m_mode.c
@@ -1583,7 +1583,11 @@ CMD_FUNC(_m_umode)
 		return 0;
 	}
 	if (acptr != sptr)
+	{
+		sendto_one(sptr, err_str(ERR_USERSDONTMATCH),
+			me.name, sptr->name);
 		return 0;
+	}
 
 	if (parc < 3)
 	{