diff --git a/lib/generators/gql/mutation_generator.rb b/lib/generators/gql/mutation_generator.rb
index 88598f1..6c9e655 100644
--- a/lib/generators/gql/mutation_generator.rb
+++ b/lib/generators/gql/mutation_generator.rb
@@ -12,6 +12,11 @@ class MutationGenerator < Rails::Generators::NamedBase
     def name
       model_name
     end
+
+    # Generate a namedspaced class name with the mutation prefix
+    def prefixed_class_name
+      (class_path + ["#{mutation_prefix}_#{file_name}"]).map!(&:camelize).join("::")
+    end
   
     def mutation
       file_name = "#{mutation_prefix}_#{singular_name}"
diff --git a/lib/generators/gql/templates/model_mutation.rb b/lib/generators/gql/templates/model_mutation.rb
index 63ab808..df7ffd8 100644
--- a/lib/generators/gql/templates/model_mutation.rb
+++ b/lib/generators/gql/templates/model_mutation.rb
@@ -1,5 +1,5 @@
 module Mutations
-  class <%= @mutation_prefix %><%= @model_name %> < Mutations::BaseMutation
+  class <%= prefixed_class_name %> < Mutations::BaseMutation
     field :<%= singular_name %>, Types::<%= @model_name %>Type, null: true
 
     argument :attributes, Types::Input::<%= @model_name %>Input, required: true