diff --git a/lib/grape/endpoint.rb b/lib/grape/endpoint.rb
index 358cb6a79c..dd07c3293f 100644
--- a/lib/grape/endpoint.rb
+++ b/lib/grape/endpoint.rb
@@ -52,7 +52,9 @@ def prepare_routes
           anchor = options[:route_options][:anchor]
           anchor = anchor.nil? ? true : anchor
 
-          path = compile_path(prepared_path, anchor && !options[:app])
+          requirements = options[:route_options][:requirements] || {}
+
+          path = compile_path(prepared_path, anchor && !options[:app], requirements)
           regex = Rack::Mount::RegexpWithNamedGroups.new(path)
           path_params = {}
           # named parameters in the api path
@@ -91,9 +93,10 @@ def namespace
       Rack::Mount::Utils.normalize_path(settings.stack.map{|s| s[:namespace]}.join('/'))
     end
 
-    def compile_path(prepared_path, anchor = true)
+    def compile_path(prepared_path, anchor = true, requirements = {})
       endpoint_options = {}
       endpoint_options[:version] = /#{settings[:version].join('|')}/ if settings[:version]
+      endpoint_options.merge!(requirements)
       Rack::Mount::Strexp.compile(prepared_path, endpoint_options, %w( / . ? ), anchor)
     end
 
diff --git a/lib/grape/middleware/formatter.rb b/lib/grape/middleware/formatter.rb
index 96547011a4..ce8827757b 100644
--- a/lib/grape/middleware/formatter.rb
+++ b/lib/grape/middleware/formatter.rb
@@ -42,13 +42,12 @@ def before
       
       def format_from_extension
         parts = request.path.split('.')
-        hit = parts.last.to_sym
-        
-        if parts.size <= 1
-          nil
-        else
-          hit
+        extension = parts.last.to_sym
+
+        if parts.size > 1 && content_types.key?(extension)
+          return extension
         end
+        nil
       end
       
       def format_from_header
diff --git a/spec/grape/endpoint_spec.rb b/spec/grape/endpoint_spec.rb
index 9ba79d51a3..d4b9beb1c4 100644
--- a/spec/grape/endpoint_spec.rb
+++ b/spec/grape/endpoint_spec.rb
@@ -107,7 +107,7 @@ def app; subject end
       ]
     end
   end
-  
+
   describe '#params' do
     it 'should be available to the caller' do
       subject.get('/hey') do
@@ -134,6 +134,42 @@ def app; subject end
       get '/location?location[city]=Dallas'
       last_response.body.should == 'Dallas'
     end
+
+    context 'with special requirements' do
+      it 'should parse email param with provided requirements for params' do
+        subject.get('/:person_email', :requirements => { :person_email => /.*/ }) do
+        params[:person_email]
+        end
+
+        get '/rodzyn@grape.com'
+        last_response.body.should == 'rodzyn@grape.com'
+
+        get 'rodzyn@grape.com.pl'
+        last_response.body.should == 'rodzyn@grape.com.pl'
+      end
+
+      it 'should parse many params with provided regexps' do
+        subject.get('/:person_email/test/:number',
+          :requirements => {
+            :person_email => /rodzyn@(.*).com/,
+            :number => /[0-9]/ }) do
+        params[:person_email] << params[:number]
+        end
+
+        get '/rodzyn@grape.com/test/1'
+        last_response.body.should == 'rodzyn@grape.com1'
+
+        get '/rodzyn@testing.wrong/test/1'
+        last_response.status.should == 404
+
+        get 'rodzyn@test.com/test/wrong_number'
+        last_response.status.should == 404
+
+        get 'rodzyn@test.com/wrong_middle/1'
+        last_response.status.should == 404
+
+      end
+    end
   end
 
   describe '#error!' do
@@ -309,4 +345,4 @@ def memoized
       end
     end
   end
-end
+end
\ No newline at end of file
diff --git a/spec/grape/middleware/formatter_spec.rb b/spec/grape/middleware/formatter_spec.rb
index 440c111650..0f030d387f 100644
--- a/spec/grape/middleware/formatter_spec.rb
+++ b/spec/grape/middleware/formatter_spec.rb
@@ -82,11 +82,6 @@ def to_xml
       subject.call({'PATH_INFO' => '/info.txt', 'HTTP_ACCEPT' => 'application/json'})
       subject.env['api.format'].should == :txt
     end
-    
-    it 'should throw an error on an unrecognized format' do
-      err = catch(:error){ subject.call({'PATH_INFO' => '/info.barklar'}) }
-      err.should == {:status => 406, :message => "The requested format is not supported."}
-    end
   end
 
   context 'Accept header detection' do