diff --git a/src/ex_cmds.h b/src/ex_cmds.h
index 24f83aa..c25ee2e 100644
--- a/src/ex_cmds.h
+++ b/src/ex_cmds.h
@@ -1012,7 +1012,7 @@
 			RANGE|WHOLEFOLD|COUNT|EXFLAGS|TRLBAR|CMDWIN|SBOXOK,
 			ADDR_LINES),
 EX(CMD_packadd,		"packadd",	ex_packadd,
-			BANG|FILE1|TRLBAR|SBOXOK|CMDWIN,
+			BANG|FILE1|NEEDARG|TRLBAR|SBOXOK|CMDWIN,
 			ADDR_LINES),
 EX(CMD_pclose,		"pclose",	ex_pclose,
 			BANG|TRLBAR,