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-rw-r--r--extensions/ebt_mark.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/extensions/ebt_mark.c b/extensions/ebt_mark.c
index 5776b1c..4cf1378 100644
--- a/extensions/ebt_mark.c
+++ b/extensions/ebt_mark.c
@@ -20,7 +20,7 @@ static int mark_supplied;
#define MARK_ORMARK '3'
#define MARK_ANDMARK '4'
#define MARK_XORMARK '5'
-static struct option opts[] =
+static const struct option opts[] =
{
{ "mark-target" , required_argument, 0, MARK_TARGET },
/* an oldtime messup, we should have always used the scheme