diff --git a/ServiceBinding/RpcLiteralRequestMessageBinder.php b/ServiceBinding/RpcLiteralRequestMessageBinder.php
index 21cfe17..f550a8b 100644
--- a/ServiceBinding/RpcLiteralRequestMessageBinder.php
+++ b/ServiceBinding/RpcLiteralRequestMessageBinder.php
@@ -96,12 +96,14 @@ class RpcLiteralRequestMessageBinder implements MessageBinderInterface
                 $value = $p->getValue($message);
             }
 
-            $value = $this->processType($type->getValue(), $value);
+            if (null !== $value) {
+                $value = $this->processType($type->getValue(), $value);
 
-            if ($p->isPublic()) {
-                $message->{$type->getName()} = $value;
-            } else {
-                $p->setValue($message, $value);
+                if ($p->isPublic()) {
+                    $message->{$type->getName()} = $value;
+                } else {
+                    $p->setValue($message, $value);
+                }
             }
 
             if (!$type->isNillable() && null === $value) {
@@ -111,4 +113,4 @@ class RpcLiteralRequestMessageBinder implements MessageBinderInterface
 
         return $message;
     }
-}
\ No newline at end of file
+}
diff --git a/ServiceBinding/RpcLiteralResponseMessageBinder.php b/ServiceBinding/RpcLiteralResponseMessageBinder.php
index d4e57df..cb6635b 100644
--- a/ServiceBinding/RpcLiteralResponseMessageBinder.php
+++ b/ServiceBinding/RpcLiteralResponseMessageBinder.php
@@ -81,12 +81,14 @@ class RpcLiteralResponseMessageBinder implements MessageBinderInterface
                 $value = $p->getValue($message);
             }
 
-            $value = $this->processType($type->getValue(), $value);
+            if (null !== $value) {
+                $value = $this->processType($type->getValue(), $value);
 
-            if ($p->isPublic()) {
-                $message->{$type->getName()} = $value;
-            } else {
-                $p->setValue($message, $value);
+                if ($p->isPublic()) {
+                    $message->{$type->getName()} = $value;
+                } else {
+                    $p->setValue($message, $value);
+                }
             }
 
             if (!$type->isNillable() && null === $value) {
diff --git a/Tests/ServiceBinding/RpcLiteralRequestMessageBinderTest.php b/Tests/ServiceBinding/RpcLiteralRequestMessageBinderTest.php
index b48adf7..d1e9786 100644
--- a/Tests/ServiceBinding/RpcLiteralRequestMessageBinderTest.php
+++ b/Tests/ServiceBinding/RpcLiteralRequestMessageBinderTest.php
@@ -133,7 +133,7 @@ class RpcLiteralRequestMessageBinderTest extends \PHPUnit_Framework_TestCase
         );
 
         $result = $result['simple_arrays'];
-        $this->assertEquals(array(), $result->array1);
+        $this->assertEquals(null, $result->array1);
         $this->assertEquals(array(), $result->getArray2());
         $this->assertEquals($array, $result->getArray3());
     }