diff --git a/src/Fracture/Http/Headers/Common.php b/src/Fracture/Http/Headers/Common.php
index b286605..8cf9e70 100755
--- a/src/Fracture/Http/Headers/Common.php
+++ b/src/Fracture/Http/Headers/Common.php
@@ -64,4 +64,14 @@ public function isFinal()
     {
         return false;
     }
+
+
+    public function getParameter($name)
+    {
+        if (array_key_exists($name, $this->data)) {
+            return $this->data[$name];
+        }
+
+        return null;
+    }
 }
diff --git a/src/Fracture/Http/RequestBuilder.php b/src/Fracture/Http/RequestBuilder.php
index 76e587b..e8f8dd6 100644
--- a/src/Fracture/Http/RequestBuilder.php
+++ b/src/Fracture/Http/RequestBuilder.php
@@ -70,7 +70,7 @@ protected function applyContentParsers($instance)
 
         foreach ($this->parsers as $value => $parser) {
             if ($header->contains($value)) {
-                $parameters = $this->alterParameters($parameters, $parser, $value);
+                $parameters += $this->alterParameters($parser, $value, $header);
             }
         }
 
@@ -78,17 +78,16 @@ protected function applyContentParsers($instance)
     }
 
 
-    private function alterParameters($parameters, $parser, $value)
+    private function alterParameters($parser, $value, $header)
     {
-        $result = call_user_func($parser);
+        $result = call_user_func($parser, $header);
 
         if (false === is_array($result)) {
             $message = "Parser for '$value' did not return a 'name => value' array of parameters";
             trigger_error($message, \E_USER_WARNING);
         }
 
-        $parameters += $result;
-        return $parameters;
+        return $result;
     }
 
 
diff --git a/tests/unit/Fracture/Http/Headers/CommonTest.php b/tests/unit/Fracture/Http/Headers/CommonTest.php
index 499fd3c..91162da 100755
--- a/tests/unit/Fracture/Http/Headers/CommonTest.php
+++ b/tests/unit/Fracture/Http/Headers/CommonTest.php
@@ -104,4 +104,22 @@ public function testParsedDataForPreparedInstance()
         $instance->prepare();
         $this->assertSame('beta', $instance->getParsedData());
     }
+
+
+    /**
+     * @covers Fracture\Http\Headers\Common::__construct
+     * @covers Fracture\Http\Headers\Common::prepare
+     * @covers Fracture\Http\Headers\Common::getParsedData
+     * @covers Fracture\Http\Headers\Common::getParameter
+     */
+    public function testValueRetrieval()
+    {
+        $instance = $this->getMockForAbstractClass('Fracture\Http\Headers\Common', ['type/subtype; name=4']);
+        $instance->expects($this->any())
+                 ->method('extractData')
+                 ->will($this->returnValue(['name' => 4]));
+
+        $instance->prepare();
+        $this->assertSame(4, $instance->getParameter('name'));
+    }
 }
diff --git a/tests/unit/Fracture/Http/RequestBuilderTest.php b/tests/unit/Fracture/Http/RequestBuilderTest.php
index 997cbc5..a6e0184 100644
--- a/tests/unit/Fracture/Http/RequestBuilderTest.php
+++ b/tests/unit/Fracture/Http/RequestBuilderTest.php
@@ -335,6 +335,31 @@ public function testAppliedContentParsersWithMissingHeader()
 
     }
 
+
+    /**
+     * @covers Fracture\Http\RequestBuilder::create
+     * @covers Fracture\Http\RequestBuilder::applyContentParsers
+     * @covers Fracture\Http\RequestBuilder::addContentParser
+     */
+    public function testAppliedContentParsersWithHeader()
+    {
+        $input = [
+            'server' => [
+                'CONTENT_TYPE'    => 'text/html;version=2',
+            ],
+        ];
+
+        $builder = $this->getMock('Fracture\Http\RequestBuilder', ['isCLI']);
+
+        $builder->addContentParser('text/html', function ($header) {
+            return ['foo' => $header->getParameter('version')];
+        });
+
+        $instance = $builder->create($input);
+        $this->assertEquals(2, $instance->getParameter('foo'));
+    }
+
+
     /**
      * @covers Fracture\Http\RequestBuilder::create
      * @covers Fracture\Http\RequestBuilder::applyContentParsers