diff --git a/lib/nghttp2_session.c b/lib/nghttp2_session.c
index 93f3f07c..5b59ca5f 100644
--- a/lib/nghttp2_session.c
+++ b/lib/nghttp2_session.c
@@ -2717,13 +2717,6 @@ nghttp2_session_pop_next_ob_item(nghttp2_session *session) {
     return item;
   }
 
-  item = nghttp2_outbound_queue_top(&session->ob_reg);
-  if (item) {
-    nghttp2_outbound_queue_pop(&session->ob_reg);
-    item->queued = 0;
-    return item;
-  }
-
   if (!session_is_outgoing_concurrent_streams_max(session)) {
     item = nghttp2_outbound_queue_top(&session->ob_syn);
     if (item) {
@@ -2733,6 +2726,13 @@ nghttp2_session_pop_next_ob_item(nghttp2_session *session) {
     }
   }
 
+  item = nghttp2_outbound_queue_top(&session->ob_reg);
+  if (item) {
+    nghttp2_outbound_queue_pop(&session->ob_reg);
+    item->queued = 0;
+    return item;
+  }
+
   if (session->remote_window_size > 0) {
     item = nghttp2_stream_next_outbound_item(&session->root);
     if (item) {