gistfile1.txt

diff --git a/lib/rbs/prototype/rb.rb b/lib/rbs/prototype/rb.rb
index 646ed909..628e9878 100644
--- a/lib/rbs/prototype/rb.rb
+++ b/lib/rbs/prototype/rb.rb
@@ -109,8 +109,26 @@ module RBS
               # Give up detect super class e.g. `class Foo < Struct.new(:bar)`
               nil
             end
+
+          const_to_name!(class_name).namespace.ascend.reject(&:empty?).reverse_each do |module_name|
+            _, name = module_name.split
+
+            mod = AST::Declarations::Module.new(
+              name: TypeName.new(name: name, namespace: Namespace.empty),
+              type_params: [],
+              self_types: [],
+              members: [],
+              annotations: [],
+              location: nil,
+              comment: comments[node.first_lineno - 1]
+            )
+
+            decls.push mod
+            decls = mod.members
+          end
+
           kls = AST::Declarations::Class.new(
-            name: const_to_name!(class_name),
+            name: TypeName.new(name: const_to_name!(class_name).name, namespace: Namespace.empty),
             super_class: super_class,
             type_params: [],
             members: [],
diff --git a/test/rbs/rb_prototype_test.rb b/test/rbs/rb_prototype_test.rb
index d0955b75..142a50bd 100644
--- a/test/rbs/rb_prototype_test.rb
+++ b/test/rbs/rb_prototype_test.rb
@@ -19,6 +19,9 @@ module Foo
 end
 
 class Bar < Struct.new(:bar)
+end
+
+class Baz::Qux
 end
     EOR
 
@@ -35,6 +38,11 @@ module Foo
 end
 
 class Bar
+end
+
+module Baz
+  class Qux
+  end
 end
     EOF
   end