diff --git a/activesupport/lib/active_support/dependencies.rb b/activesupport/lib/active_support/dependencies.rb
index d7c5946a77bf3c97f09165a64956b609fc4e0965..f8fc22e16f037b44498a69c584301d7e22e59f68 100644
--- a/activesupport/lib/active_support/dependencies.rb
+++ b/activesupport/lib/active_support/dependencies.rb
@@ -472,7 +472,7 @@ def remove_unloadable_constants!
     # Determine if the given constant has been automatically loaded.
     def autoloaded?(desc)
       # No name => anonymous module.
-      return false if desc.is_a?(Module) && desc.name.blank?
+      return false if desc.is_a?(Module) && desc.anonymous?
       name = to_constant_name desc
       return false unless qualified_const_defined? name
       return autoloaded_constants.include?(name)