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-rw-r--r--extensions/libxt_tcpmss.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/extensions/libxt_tcpmss.c b/extensions/libxt_tcpmss.c
index 35ddcd6c..b54a890e 100644
--- a/extensions/libxt_tcpmss.c
+++ b/extensions/libxt_tcpmss.c
@@ -66,7 +66,7 @@ tcpmss_parse(int c, char **argv, int invert, unsigned int *flags,
xtables_error(PARAMETER_PROBLEM,
"Only one `--mss' allowed");
xtables_check_inverse(optarg, &invert, &optind, 0, argv);
- parse_tcp_mssvalues(argv[optind-1],
+ parse_tcp_mssvalues(optarg,
&mssinfo->mss_min, &mssinfo->mss_max);
if (invert)
mssinfo->invert = 1;