diff --git a/lib/her/model/parse.rb b/lib/her/model/parse.rb
index db43d98f..93ebfccb 100644
--- a/lib/her/model/parse.rb
+++ b/lib/her/model/parse.rb
@@ -58,8 +58,7 @@ def to_params(attributes, changes={})
         def embeded_params(attributes)
           associations[:has_many].select { |a| attributes.include?(a[:data_key])}.compact.inject({}) do |hash, association|
             params = attributes[association[:data_key]].map(&:to_params)
-            next if params.empty?
-            if association[:class_name].constantize.include_root_in_json?
+            if her_nearby_class(association[:class_name]).include_root_in_json?
               root = association[:class_name].constantize.root_element
               hash[association[:data_key]] = params.map { |n| n[root] }
             else
diff --git a/spec/model/parse_spec.rb b/spec/model/parse_spec.rb
index 4ef1bc32..9d03c748 100644
--- a/spec/model/parse_spec.rb
+++ b/spec/model/parse_spec.rb
@@ -342,4 +342,44 @@ def to_params
       expect(user.to_params).to eql(:user => {:first_name => 'Someone'})
     end
   end
+
+  context 'objects or attributes empty for an association' do
+    before do
+      Her::API.setup :url => "https://api.example.com", :send_only_modified_attributes => true do |builder|
+        builder.use Her::Middleware::FirstLevelParseJSON
+        builder.use Faraday::Request::UrlEncoded
+      end
+
+      spawn_model "User" do
+        has_many :pets
+      end
+      spawn_model "Pet"
+
+    end
+
+    subject { User.build(fullname: "Tobias Fünke", pets: []) }
+
+    it 'should not raise an error while trying to parse to params' do
+      expect{ subject.to_params }.to_not raise_error
+    end
+  end
+
+  context 'parsing an association of a class in a module'
+    before do
+      Her::API.setup :url => "https://api.example.com", :send_only_modified_attributes => true do |builder|
+        builder.use Her::Middleware::FirstLevelParseJSON
+        builder.use Faraday::Request::UrlEncoded
+      end
+
+      spawn_model "Foo::User" do
+        has_many :pets
+      end
+      spawn_model "Foo::Pet"
+    end
+
+    subject { Foo::User.build(fullname: "Tobias Fünke", pets: []) }
+
+    it 'should not raise an error while trying to parse to params' do
+      expect{ subject.to_params }.to_not raise_error
+    end
 end