1 files changed, 1 insertions, 1 deletions
diff --git a/activesupport/lib/active_support/core_ext/module/introspection.rb b/activesupport/lib/active_support/core_ext/module/introspection.rb
index 40bbebb7c4..bb894ec080 100644
--- a/activesupport/lib/active_support/core_ext/module/introspection.rb
+++ b/activesupport/lib/active_support/core_ext/module/introspection.rb
@@ -70,6 +70,6 @@ class Module
   # Returns the names of the constants defined locally rather than the
   # constants themselves. See <tt>local_constants</tt>.
   def local_constant_names
-    local_constants.map(&:to_s)
+    local_constants.map { |c| c.to_s }
   end
 end