diff --git a/src/custom.c b/src/custom.c
index e8cf0fe..1169b18 100644
--- a/src/custom.c
+++ b/src/custom.c
@@ -270,9 +270,10 @@ custom_load_conf (struct conf *conf, int background)
           var = 0;
           break;
         case CUSTOM_CONF_PERIODICSAVE:
-          conf->periodic_save = atoi (e_conf);
-          if (conf->periodic_save < 0)
+          if (atoi (e_conf) < 0)
             conf->periodic_save = 0;
+          else
+            conf->periodic_save = atoi (e_conf);
           var = 0;
           break;
         case CUSTOM_CONF_CONFIRMQUIT:
diff --git a/src/mem.c b/src/mem.c
index ac43103..1e54afc 100644
--- a/src/mem.c
+++ b/src/mem.c
@@ -95,8 +95,6 @@ stats_del_blk (unsigned id)
 {
   struct mem_blk *o, **i;
 
-  EXIT_IF (id < 0, _("Incorrect block id"));
-
   i = &mstats.blk;
   for (o = mstats.blk; o; o = o->next)
     {