diff --git a/.travis.yml b/.travis.yml
index c0b78f0fe..f21b7cf5e 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,10 +1,8 @@
 language: ruby
 sudo: false
 rvm:
-  - 1.9.3
-  - 2.0.0
-  - 2.1.7
-  - 2.2.3
+  - 2.2.5
+  - 2.3.1
 gemfile:
   - Gemfile.rails32
   - Gemfile.rails40
diff --git a/lib/apipie/dsl_definition.rb b/lib/apipie/dsl_definition.rb
index 0c35f2dbc..fc3369a96 100644
--- a/lib/apipie/dsl_definition.rb
+++ b/lib/apipie/dsl_definition.rb
@@ -26,7 +26,7 @@ def _apipie_dsl_data_init
          :errors            => [],
          :params            => [],
          :headers           => [],
-         :resouce_id        => nil,
+         :resource_id        => nil,
          :short_description => nil,
          :description       => nil,
          :examples          => [],
@@ -223,7 +223,7 @@ def _apipie_define_validators(description)
               if Apipie.configuration.validate_presence?
                 method_params.each do |_, param|
                   # check if required parameters are present
-                  raise ParamMissing.new(param) if param.required && !params.has_key?(param.name)
+                  raise ParamMissing.new(param, param) if param.required && !params.has_key?(param.name)
                 end
               end
 
@@ -239,7 +239,7 @@ def _apipie_define_validators(description)
               if Apipie.configuration.validate_key?
                 params.reject{|k,_| %w[format controller action].include?(k.to_s) }.each_key do |param|
                   # params allowed
-                  raise UnknownParam.new(param) if method_params.select {|_,p| p.name.to_s == param.to_s}.empty?
+                  raise UnknownParam.new(param, param) if method_params.select {|_,p| p.name.to_s == param.to_s}.empty?
                 end
               end
 
diff --git a/lib/apipie/errors.rb b/lib/apipie/errors.rb
index 62472bb0a..c1d28e8bf 100644
--- a/lib/apipie/errors.rb
+++ b/lib/apipie/errors.rb
@@ -8,10 +8,15 @@ class ParamError < Error
 
   # abstract
   class DefinedParamError < ParamError
-    attr_accessor :param
+    attr_accessor :param, :param_description
 
-    def initialize(param)
+    def initialize(param, param_description)
       @param = param
+      @param_description = param_description
+    end
+
+    def parameter_path
+      param_description.parents_path
     end
   end
 
@@ -27,6 +32,10 @@ def to_s
         "Missing parameter #{@param.name}"
       end
     end
+
+    def parameter_path
+      [param.name] + param_description.parents_path
+    end
   end
 
   class UnknownParam < DefinedParamError
@@ -38,8 +47,8 @@ def to_s
   class ParamInvalid < DefinedParamError
     attr_accessor :value, :error
 
-    def initialize(param, value, error)
-      super param
+    def initialize(param, value, error, param_description)
+      super param, param_description
       @value = value
       @error = error
     end
diff --git a/lib/apipie/param_description.rb b/lib/apipie/param_description.rb
index 47ba6db03..3fd2534af 100644
--- a/lib/apipie/param_description.rb
+++ b/lib/apipie/param_description.rb
@@ -105,6 +105,19 @@ def parents_and_self
       ret
     end
 
+    # Get parameter parents names
+    def parents_path
+      names ||= []
+      obj = self
+
+      while !obj.nil?
+        names << obj.name
+        obj = obj.parent
+      end
+
+      names
+    end
+
     def to_json(lang = nil)
       hash = { :name => name.to_s,
                :full_name => full_name,
diff --git a/lib/apipie/validator.rb b/lib/apipie/validator.rb
index e4bfa0e65..14aaed361 100644
--- a/lib/apipie/validator.rb
+++ b/lib/apipie/validator.rb
@@ -48,7 +48,7 @@ def description
       end
 
       def error
-        ParamInvalid.new(param_name, @error_value, description)
+        ParamInvalid.new(param_name, @error_value, description, param_description)
       end
 
       def to_s
@@ -263,7 +263,7 @@ def self.build(param_description, argument, options, proc)
       end
 
       def error
-        ParamInvalid.new(param_name, @error_value, @help)
+        ParamInvalid.new(param_name, @error_value, @help, param_description)
       end
 
       def description
@@ -306,7 +306,7 @@ def validate(value)
         if @hash_params
           @hash_params.each do |k, p|
             if Apipie.configuration.validate_presence?
-              raise ParamMissing.new(p) if p.required && !value.has_key?(k)
+              raise ParamMissing.new(p, param_description) if p.required && !value.has_key?(k)
             end
             if Apipie.configuration.validate_value?
               p.validate(value[k]) if value.has_key?(k)
diff --git a/spec/controllers/users_controller_spec.rb b/spec/controllers/users_controller_spec.rb
index b89f79229..6b41fe1b1 100644
--- a/spec/controllers/users_controller_spec.rb
+++ b/spec/controllers/users_controller_spec.rb
@@ -143,6 +143,13 @@ def reload_controllers
             assert_response :success
           end
 
+          it "should work with {} value for a required hash param" do
+            expect {
+              get :show, :id => '5', :session => "secret_hash", :hash_param => {:dummy_hash => {}}
+            }.to raise_error(Apipie::ParamMissing, 'Missing parameter dummy_2')
+            assert_response :success
+          end
+
           it "should fail if required parameter is missing" do
             expect { get :show, :id => 5 }.to raise_error(Apipie::ParamMissing, /session_parameter_is_required/)
           end