diff --git a/src/http/modules/ngx_http_upstream_least_conn_module.c b/src/http/modules/ngx_http_upstream_least_conn_module.c
index 21156ae..bd2f1bc 100644
--- a/src/http/modules/ngx_http_upstream_least_conn_module.c
+++ b/src/http/modules/ngx_http_upstream_least_conn_module.c
@@ -313,7 +313,9 @@
         lcp->rrp.peers = peers->next;
         pc->tries = lcp->rrp.peers->number;
 
-        n = lcp->rrp.peers->number / (8 * sizeof(uintptr_t)) + 1;
+        n = (lcp->rrp.peers->number + (8 * sizeof(uintptr_t) - 1))
+                / (8 * sizeof(uintptr_t));
+
         for (i = 0; i < n; i++) {
              lcp->rrp.tried[i] = 0;
         }
diff --git a/src/http/ngx_http_upstream_round_robin.c b/src/http/ngx_http_upstream_round_robin.c
index 4b78cff..61dce69 100644
--- a/src/http/ngx_http_upstream_round_robin.c
+++ b/src/http/ngx_http_upstream_round_robin.c
@@ -474,7 +474,9 @@
         rrp->peers = peers->next;
         pc->tries = rrp->peers->number;
 
-        n = rrp->peers->number / (8 * sizeof(uintptr_t)) + 1;
+        n = (rrp->peers->number + (8 * sizeof(uintptr_t) - 1))
+                / (8 * sizeof(uintptr_t));
+
         for (i = 0; i < n; i++) {
              rrp->tried[i] = 0;
         }