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-rw-r--r--plugins/check_http.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/plugins/check_http.c b/plugins/check_http.c
index 5c8a80c6..63addfcc 100644
--- a/plugins/check_http.c
+++ b/plugins/check_http.c
@@ -285,7 +285,7 @@ process_arguments (int argc, char **argv)
#ifdef HAVE_SSL
if ((temp=strchr(optarg,','))!=NULL) {
*temp='\0';
- if (!is_intnonneg (temp))
+ if (!is_intnonneg (optarg))
usage2 (_("Invalid certificate expiration period"), optarg);
days_till_exp_warn = atoi(optarg);
*temp=',';