diff --git a/src/ex_cmds.h b/src/ex_cmds.h
index 74aaf4e..f66a974 100644
--- a/src/ex_cmds.h
+++ b/src/ex_cmds.h
@@ -837,6 +837,8 @@
 			BANG|TRLBAR),
 EX(CMD_spellrepall,	"spellrepall",	ex_spellrepall,
 			TRLBAR),
+EX(CMD_spellundo,	"spellundo",	ex_spell,
+			BANG|RANGE|NOTADR|NEEDARG|EXTRA|TRLBAR),
 EX(CMD_sprevious,	"sprevious",	ex_previous,
 			EXTRA|RANGE|NOTADR|COUNT|BANG|EDITCMD|ARGOPT|TRLBAR),
 EX(CMD_srewind,		"srewind",	ex_rewind,