diff --git a/src/core/ngx_resolver.c b/src/core/ngx_resolver.c
index 222b3d7..28f1392 100644
--- a/src/core/ngx_resolver.c
+++ b/src/core/ngx_resolver.c
@@ -1589,7 +1589,7 @@
 
     i += sizeof("\7in-addr\4arpa") + sizeof(ngx_resolver_qs_t);
 
-    if (i + 2 + sizeof(ngx_resolver_an_t) > (ngx_uint_t) n) {
+    if (i + 2 + sizeof(ngx_resolver_an_t) > n) {
         goto short_response;
     }
 
@@ -1617,7 +1617,7 @@
 
     i += 2 + sizeof(ngx_resolver_an_t);
 
-    if (i + len > (ngx_uint_t) n) {
+    if (i + len > n) {
         goto short_response;
     }