diff --git a/lib/liquid/standardfilters.rb b/lib/liquid/standardfilters.rb
index 482afd4..6ff4f35 100644
--- a/lib/liquid/standardfilters.rb
+++ b/lib/liquid/standardfilters.rb
@@ -421,7 +421,7 @@ module Liquid
       result.is_a?(BigDecimal) ? result.to_f : result
     end
 
-    def default(input, default_value = ''.freeze, allow_false: false)
+    def default(input, default_value = '', allow_false: false)
       if (allow_false ? input.nil? : !input) || input.respond_to?(:empty?) && input.empty?
         default_value
       else