diff --git a/src/ex_cmds.h b/src/ex_cmds.h
index 393f714..9dcf0d5 100644
--- a/src/ex_cmds.h
+++ b/src/ex_cmds.h
@@ -941,6 +941,8 @@
 			EXTRA|TRLBAR|NOTRLCOM|USECTRLV|CMDWIN),
 EX(CMD_undo,		"undo",		ex_undo,
 			TRLBAR|CMDWIN),
+EX(CMD_undojoin,	"undojoin",	ex_undojoin,
+			TRLBAR|CMDWIN),
 EX(CMD_unabbreviate,	"unabbreviate",	ex_abbreviate,
 			EXTRA|TRLBAR|NOTRLCOM|USECTRLV|CMDWIN),
 EX(CMD_unhide,		"unhide",	ex_buffer_all,