diff --git a/hydra.c b/hydra.c
index 531a5be..5b9a49d 100644
--- a/hydra.c
+++ b/hydra.c
@@ -3917,6 +3917,8 @@ int main(int argc, char *argv[]) {
       for (j = 0; j < hydra_options.max_use; j++)
         if (hydra_heads[j]->active >= 0)
           k++;
+      if ((long)(hydra_brains.todo_all - hydra_brains.sent) <= 0) //in case of overflow of unsigned "-1"
+        bail("Weird bug detected where more tests were performed than possible. Please post your command line here: https://github.com/vanhauser-thc/thc-hydra/issues/113 or send it in an email to vh@thc.org")
       printf("[STATUS] %.2f tries/min, %lu tries in %02lu:%02luh, %lu to do in %02lu:%02luh, %d active\n", (1.0 * hydra_brains.sent) / (((elapsed_status - starttime) * 1.0) / 60),     // tries/min 
              hydra_brains.sent, // tries 
              (long unsigned int) ((elapsed_status - starttime) / 3600), // hours