diff --git a/lib/i18n_interpolation_fallbacks.rb b/lib/i18n_interpolation_fallbacks.rb
index 067601bcb..cdf248019 100644
--- a/lib/i18n_interpolation_fallbacks.rb
+++ b/lib/i18n_interpolation_fallbacks.rb
@@ -5,6 +5,7 @@ module I18n
       def translate(locale, key, options = {})
         return super if options[:fallback]
         default = extract_string_or_lambda_default!(options) if options[:default]
+        options.merge!(:default => default) if default
 
         options[:fallback] = true
         I18n.fallbacks[locale].each do |fallback|
@@ -16,7 +17,7 @@ module I18n
         end
         options.delete(:fallback)
 
-        return super(locale, nil, options.merge(:default => default)) if default
+        return super(locale, nil, options) if default
         raise(I18n::MissingInterpolationArgument.new(options, "key: #{key} in locale: #{locale}"))
       end
     end
diff --git a/spec/support/i18n_raise_errors.rb b/spec/support/i18n_raise_errors.rb
index 414867feb..915ddf919 100644
--- a/spec/support/i18n_raise_errors.rb
+++ b/spec/support/i18n_raise_errors.rb
@@ -1,6 +1,6 @@
 module I18n
   def self.just_raise_that_exception(*args)
-    raise "Translation not found: #{args.first.key}"
+    raise "Translation not found: #{args.first.inspect}"
   end
 end