1 files changed, 1 insertions, 1 deletions

diff --git a/plugins/check_mysql.c b/plugins/check_mysql.c
index 5c7bcb0d..6d6f19a9 100644
--- a/plugins/check_mysql.c
+++ b/plugins/check_mysql.c
@@ -207,7 +207,7 @@ process_arguments (int argc, char **argv)
         if (strlen(db) == 0 && argc > c)
                 db = argv[c++];
 
-        if (is_intnonneg (argv[c]))
+        if (is_intnonneg (argv[c]) && argc > c)
                 db_port = atoi (argv[c++]);
 
         return validate_arguments ();