1 files changed, 7 insertions, 2 deletions
diff --git a/activesupport/lib/active_support/core_ext/big_decimal/conversions.rb b/activesupport/lib/active_support/core_ext/big_decimal/conversions.rb
index 3ec7e576c8..5dc5710c53 100644
--- a/activesupport/lib/active_support/core_ext/big_decimal/conversions.rb
+++ b/activesupport/lib/active_support/core_ext/big_decimal/conversions.rb
@@ -17,8 +17,13 @@ class BigDecimal
   end
 
   DEFAULT_STRING_FORMAT = 'F'
-  def to_formatted_s(format = DEFAULT_STRING_FORMAT)
-    _original_to_s(format)
+  def to_formatted_s(*args)
+    if args[0].is_a?(Symbol)
+      super
+    else
+      format = args[0] || DEFAULT_STRING_FORMAT
+      _original_to_s(format)
+    end
   end
   alias_method :_original_to_s, :to_s
   alias_method :to_s, :to_formatted_s