diff --git a/src/SoapHeaderEventSubscriber.php b/src/SoapHeaderEventSubscriber.php
index fb6f890..173800f 100644
--- a/src/SoapHeaderEventSubscriber.php
+++ b/src/SoapHeaderEventSubscriber.php
@@ -68,9 +68,15 @@ public function addSoapHeader(ObjectEvent $event)
                     $document->firstChild->firstChild
                 )
             );
+
+            $tagName = $metadata->xmlRootName;
+            if ($metadata->xmlRootPrefix !== null) {
+                $tagName = $metadata->xmlRootPrefix . ':' . $metadata->xmlRootName;
+            }
+
             $visitor->setCurrentNode(
                 $header->appendChild(
-                    $document->createElementNS($metadata->xmlRootNamespace, $metadata->xmlRootName)
+                    $document->createElementNS($metadata->xmlRootNamespace, $tagName)
                 )
             );
 
diff --git a/src/SoapMessageEventSubscriber.php b/src/SoapMessageEventSubscriber.php
index 9216942..8d6c9d7 100644
--- a/src/SoapMessageEventSubscriber.php
+++ b/src/SoapMessageEventSubscriber.php
@@ -56,8 +56,13 @@ public function addMessage(PreSerializeEvent $event)
                 throw new RuntimeException('Missing XmlRootName or XmlRootNamespace for ' . $event->getType()['name']);
             }
 
+            $tagName = $metadata->xmlRootName;
+            if ($metadata->xmlRootPrefix !== null) {
+                $tagName = $metadata->xmlRootPrefix . ':' . $metadata->xmlRootName;
+            }
+            
             $document = $visitor->getDocument();
-            $message = $document->createElementNS($metadata->xmlRootNamespace, $metadata->xmlRootName);
+            $message = $document->createElementNS($metadata->xmlRootNamespace, $tagName);
 
             $visitor->getCurrentNode()->appendChild($message);
             $visitor->setCurrentNode($message);
diff --git a/tests/Fixtures/HeaderLoginWithPrefix.php b/tests/Fixtures/HeaderLoginWithPrefix.php
new file mode 100644
index 0000000..2080707
--- /dev/null
+++ b/tests/Fixtures/HeaderLoginWithPrefix.php
@@ -0,0 +1,18 @@
+<?php
+
+declare(strict_types=1);
+
+namespace DMT\Test\Soap\Serializer\Fixtures;
+
+use JMS\Serializer\Annotation as JMS;
+
+/**
+ * Class HeaderLogin
+ *
+ * @JMS\AccessType("public_method")
+ * @JMS\XmlNamespace(uri="http://xmpl-namespace.nl", prefix="")
+ * @JMS\XmlRoot("HeaderAuthenticate", namespace="http://xmpl-namespace.nl", prefix="ns")
+ */
+class HeaderLoginWithPrefix extends HeaderLogin
+{
+}
\ No newline at end of file
diff --git a/tests/Fixtures/LanguageWithPrefix.php b/tests/Fixtures/LanguageWithPrefix.php
new file mode 100644
index 0000000..98f051a
--- /dev/null
+++ b/tests/Fixtures/LanguageWithPrefix.php
@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace DMT\Test\Soap\Serializer\Fixtures;
+
+use JMS\Serializer\Annotation as JMS;
+
+/**
+ * Class ListLanguagesWithPrefix
+ *
+ * @JMS\AccessType("public_method")
+ * @JMS\XmlRoot("Language", namespace="http://xmpl-namespace.nl", prefix="ns")
+ */
+class LanguageWithPrefix extends Language
+{
+}
\ No newline at end of file
diff --git a/tests/SoapHeaderEventSubscriberTest.php b/tests/SoapHeaderEventSubscriberTest.php
index 59b6bf4..e453c4e 100644
--- a/tests/SoapHeaderEventSubscriberTest.php
+++ b/tests/SoapHeaderEventSubscriberTest.php
@@ -10,6 +10,7 @@
 use DMT\Soap\Serializer\SoapSerializationVisitorFactory;
 use DMT\Test\Soap\Serializer\Fixtures\Count;
 use DMT\Test\Soap\Serializer\Fixtures\HeaderLogin;
+use DMT\Test\Soap\Serializer\Fixtures\HeaderLoginWithPrefix;
 use DMT\Test\Soap\Serializer\Fixtures\Language;
 use DMT\Test\Soap\Serializer\Fixtures\ListLanguages;
 use Doctrine\Common\Annotations\AnnotationRegistry;
@@ -82,4 +83,59 @@ function (HandlerRegistry $registry) {
         static::assertSame('dummy', strval($header->username));
         static::assertSame('secret123!', strval($header->password));
     }
+
+    /**
+     * Test the SOAP Header is added, when provided.
+     */
+    public function testAddingSoapHeaderWithPrefix()
+    {
+        AnnotationRegistry::registerUniqueLoader('class_exists');
+
+        $serializer = SerializerBuilder::create()
+            ->setSerializationVisitor('soap', new SoapSerializationVisitorFactory())
+            ->setPropertyNamingStrategy(
+                new SerializedNameAnnotationStrategy(
+                    new IdenticalPropertyNamingStrategy()
+                )
+            )
+            ->configureListeners(
+                function (EventDispatcher $dispatcher) {
+                    $dispatcher->addSubscriber(
+                        new SoapMessageEventSubscriber()
+                    );
+                    $dispatcher->addSubscriber(
+                        new SoapHeaderEventSubscriber(
+                            new HeaderLoginWithPrefix('dummy', 'secret123!')
+                        )
+                    );
+                }
+            )
+            ->configureHandlers(
+                function (HandlerRegistry $registry) {
+                    $registry->registerSubscribingHandler(new SoapDateHandler());
+                }
+            )
+            ->build();
+
+        $languages = new ListLanguages();
+        $languages->setLanguages([
+            new Language('Python', 33, new DateTime('1994-01-25')),
+            new Language('Perl', 40, new DateTime('1987-12-18'))
+        ]);
+        $languages->setCount(new Count(2));
+
+        $serialized = $serializer->serialize($languages, 'soap');
+
+        $doc = new \DOMDocument();
+        $doc->loadXML($serialized);
+
+        $xpath = new \DOMXPath($doc);
+        $node = $xpath->query('//*[local-name()="HeaderAuthenticate" and namespace-uri()="http://xmpl-namespace.nl"]')[0];
+        $username = $xpath->query('//*[local-name()="username" and namespace-uri()="http://xmpl-namespace.nl"]')[0];
+        $password = $xpath->query('//*[local-name()="password" and namespace-uri()="http://xmpl-namespace.nl"]')[0];
+
+        static::assertSame('ns', $node->prefix);
+        static::assertSame('ns', $username->prefix);
+        static::assertSame('ns', $password->prefix);
+    }
 }
diff --git a/tests/SoapSerializationTest.php b/tests/SoapSerializationTest.php
index d81e4be..82212e5 100644
--- a/tests/SoapSerializationTest.php
+++ b/tests/SoapSerializationTest.php
@@ -5,6 +5,7 @@
 use DateTime;
 use DMT\Soap\Serializer\SoapNamespaceInterface;
 use DMT\Test\Soap\Serializer\Fixtures\Language;
+use DMT\Test\Soap\Serializer\Fixtures\LanguageWithPrefix;
 use PHPUnit\Framework\TestCase;
 
 /**
@@ -38,6 +39,32 @@ public function testSerialization(string $name, int $complexity, DateTime $date)
         static::assertSame($date->format('Y-m-d'), strval($message->since));
     }
 
+    /**
+     * @dataProvider provideLanguage
+     *
+     * @param string $name
+     * @param int $complexity
+     * @param DateTime $date
+     */
+    public function testSerializationWithPrefix(string $name, int $complexity, DateTime $date)
+    {
+        $serialized = $this->serializer->serialize(new LanguageWithPrefix($name, $complexity, $date), 'soap');
+
+        $doc = new \DOMDocument();
+        $doc->loadXML($serialized);
+
+        $xpath = new \DOMXPath($doc);
+        $node = $xpath->query('//*[local-name()="Language" and namespace-uri()="http://xmpl-namespace.nl"]')[0];
+        $name = $xpath->query('//*[local-name()="name" and namespace-uri()="http://xmpl-namespace.nl"]')[0];
+        $complexity = $xpath->query('//*[local-name()="complexity" and namespace-uri()="http://xmpl-namespace.nl"]')[0];
+        $since = $xpath->query('//*[local-name()="since" and namespace-uri()="http://xmpl-namespace.nl"]')[0];
+
+        static::assertSame('ns', $node->prefix);
+        static::assertSame('ns', $name->prefix);
+        static::assertSame('ns', $complexity->prefix);
+        static::assertSame('ns', $since->prefix);
+    }
+
     public function provideLanguage(): array
     {
         return [