diff --git a/lib/reline/config.rb b/lib/reline/config.rb
index 5ba269258f..87726393a6 100644
--- a/lib/reline/config.rb
+++ b/lib/reline/config.rb
@@ -93,7 +93,7 @@ class Reline::Config
   end
 
   def editing_mode_is?(*val)
-    (val.respond_to?(:any?) ? val : [val]).any?(@editing_mode_label)
+    val.any?(@editing_mode_label)
   end
 
   def keymap