diff --git a/README.rst b/README.rst
index 99a3cdf6..003d6c99 100644
--- a/README.rst
+++ b/README.rst
@@ -1163,6 +1163,17 @@ ArrayValidator
 
 Check if the parameter is an array
 
+DecimalValidator
+--------------
+
+Check if the parameter is a decimal number
+
+.. code:: ruby
+
+  param :latitude, :decimal, :desc => "Geographic latitude", :required => true
+  param :longitude, :decimal, :desc => "Geographic longitude", :required => true
+
+
 Additional options
 ~~~~~~~~~~~~~~~~~
 
diff --git a/lib/apipie/extractor/collector.rb b/lib/apipie/extractor/collector.rb
index 195e4179..84620223 100644
--- a/lib/apipie/extractor/collector.rb
+++ b/lib/apipie/extractor/collector.rb
@@ -75,6 +75,10 @@ def refine_params_description(params_desc, recorded_params)
             if param_desc[:type].first == :number && (key.to_s !~ /id$/ || !Apipie::Validator::NumberValidator.validate(value))
               param_desc[:type].shift
             end
+
+            if param_desc[:type].first == :decimal && (key.to_s !~ /id$/ || !Apipie::Validator::DecimalValidator.validate(value))
+              param_desc[:type].shift
+            end
           end
 
           if value.is_a? Hash
diff --git a/lib/apipie/validator.rb b/lib/apipie/validator.rb
index 30ddbc18..dd90071a 100644
--- a/lib/apipie/validator.rb
+++ b/lib/apipie/validator.rb
@@ -398,6 +398,27 @@ def description
       end
     end
 
+    class DecimalValidator < BaseValidator
+
+      def validate(value)
+        self.class.validate(value)
+      end
+
+      def self.build(param_description, argument, options, block)
+        if argument == :decimal
+          self.new(param_description)
+        end
+      end
+
+      def description
+        "Must be a decimal number."
+      end
+
+      def self.validate(value)
+        value.to_s =~ /\A^[-+]?[0-9]+([,.][0-9]+)?\Z$/
+      end
+    end
+
     class NumberValidator < BaseValidator
 
       def validate(value)