diff --git a/lib/raven/processor/removecircularreferences.rb b/lib/raven/processor/removecircularreferences.rb
index 0f6acaf34..6fc580663 100644
--- a/lib/raven/processor/removecircularreferences.rb
+++ b/lib/raven/processor/removecircularreferences.rb
@@ -6,9 +6,9 @@ def process(value, visited = [])
 
       case value
       when Hash
-        !value.frozen? ? value.merge!(value) { |_, v| process v, visited } : value.merge(value) { |_, v| process v, visited }
+        value.merge(value) { |_, v| process v, visited }
       when Array
-        !value.frozen? ? value.map! { |v| process v, visited } : value.map { |v| process v, visited }
+        value.map { |v| process v, visited }
       else
         value
       end