diff --git a/src/ex_cmds.h b/src/ex_cmds.h
index e275d02..3c802d2 100644
--- a/src/ex_cmds.h
+++ b/src/ex_cmds.h
@@ -290,6 +290,8 @@
 			TRLBAR),
 EX(CMD_diffget,		"diffget",	ex_diffgetput,
 			RANGE|EXTRA|TRLBAR|MODIFY),
+EX(CMD_diffoff,		"diffoff",	ex_diffoff,
+			BANG|TRLBAR),
 EX(CMD_diffpatch,	"diffpatch",	ex_diffpatch,
 			EXTRA|FILE1|TRLBAR|MODIFY),
 EX(CMD_diffput,		"diffput",	ex_diffgetput,