diff --git a/lib/resolv.rb b/lib/resolv.rb
index 6e7fb98733..51083134a3 100644
--- a/lib/resolv.rb
+++ b/lib/resolv.rb
@@ -722,7 +722,7 @@ class Resolv
       def close
         socks = @socks
         @socks = nil
-        socks.each(&:close) if socks
+        socks&.each(&:close)
       end
 
       class Sender # :nodoc: