diff --git a/lib/fluent/plugin/out_forward.rb b/lib/fluent/plugin/out_forward.rb
index 058f8a02da..80383fe408 100644
--- a/lib/fluent/plugin/out_forward.rb
+++ b/lib/fluent/plugin/out_forward.rb
@@ -1084,10 +1084,10 @@ def connect(host = nil)
           begin
             yield(sock)
           rescue
-            @socket_cache.revoke(sock) if @keepalive
+            @socket_cache.revoke if @keepalive
             raise
           else
-            @socket_cache.dec_ref(sock) if @keepalive
+            @socket_cache.dec_ref if @keepalive
           ensure
             sock.close unless @keepalive
           end