diff --git a/lib/isc/netmgr/http.c b/lib/isc/netmgr/http.c
index 32d632bb18..93ab907406 100644
--- a/lib/isc/netmgr/http.c
+++ b/lib/isc/netmgr/http.c
@@ -644,13 +644,11 @@ on_server_data_chunk_recv_callback(int32_t stream_id, const uint8_t *data,
 					&h2->rbuf,
 					isc_mem_allocate(mctx,
 							 h2->content_length),
-					MAX_DNS_MESSAGE_SIZE);
+					h2->content_length);
 			}
 			size_t new_bufsize = isc_buffer_usedlength(&h2->rbuf) +
 					     len;
-			if (new_bufsize <= MAX_DNS_MESSAGE_SIZE &&
-			    new_bufsize <= h2->content_length)
-			{
+			if (new_bufsize <= h2->content_length) {
 				session->processed_useful_data += len;
 				isc_buffer_putmem(&h2->rbuf, data, len);
 				break;