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-rw-r--r--tap-bootpstat.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/tap-bootpstat.c b/tap-bootpstat.c
index 8063aa39f1..a7b08ec0c2 100644
--- a/tap-bootpstat.c
+++ b/tap-bootpstat.c
@@ -136,10 +136,10 @@ dhcpstat_draw(void *psp)
/* When called, this function will create a new instance of tap-boopstat.
*/
static void
-dhcpstat_init(char *optarg)
+dhcpstat_init(const char *optarg)
{
dhcpstat_t *sp;
- char *filter=NULL;
+ const char *filter=NULL;
GString *error_string;
if (!strncmp (optarg, "bootp,stat,", 11)){