diff --git a/hydra.c b/hydra.c
index f9ec44f..9472fa8 100644
--- a/hydra.c
+++ b/hydra.c
@@ -726,6 +726,10 @@ void hydra_restore_write(int print_msg) {
     }
   for (j = 0; j < hydra_options.max_use; j++) {
     memcpy((char *) &hh, hydra_heads[j], sizeof(hydra_head));
+    if (j == 0 && debug) {
+      printf("[DEBUG] sizeof hydra_head: %d\n", sizeof(hydra_head));
+      printf("[DEBUG] memcmp: %d\n", memcmp(hydra_heads[j], &hh, sizeof(hydra_head)));
+    }
     hh.active = 0;              // re-enable disabled heads
     if ((hh.current_login_ptr != NULL && hh.current_login_ptr != empty_login)
         || (hh.current_pass_ptr != NULL && hh.current_pass_ptr != empty_login)) {