diff --git a/src/CG/Generator/BuiltinType.php b/src/CG/Generator/BuiltinType.php
index 4317118..afcd090 100644
--- a/src/CG/Generator/BuiltinType.php
+++ b/src/CG/Generator/BuiltinType.php
@@ -4,7 +4,7 @@
 
 class BuiltinType
 {
-    private static $builtinTypes = array('self', 'array', 'callable', 'bool', 'float', 'int', 'string');
+    private static $builtinTypes = array('self', 'array', 'callable', 'bool', 'float', 'int', 'string', 'void');
     
     private function __construct(){
         // Static class
diff --git a/src/CG/Proxy/InterceptionGenerator.php b/src/CG/Proxy/InterceptionGenerator.php
index fd81ccf..2044c72 100644
--- a/src/CG/Proxy/InterceptionGenerator.php
+++ b/src/CG/Proxy/InterceptionGenerator.php
@@ -95,12 +95,16 @@ public function generate(\ReflectionClass $originalClass, PhpClass $genClass)
         $loaderSetter->addParameter($loaderParam);
 
         $interceptorCode =
-             '$ref = new \ReflectionMethod(%s, %s);'."\n"
+            '$ref = new \ReflectionMethod(%s, %s);'."\n"
             .'$interceptors = $this->'.$this->prefix.'loader->loadInterceptors($ref, $this, array(%s));'."\n"
             .'$invocation = new \CG\Proxy\MethodInvocation($ref, $this, array(%s), $interceptors);'."\n\n"
-            .'return $invocation->proceed();'
         ;
 
+        $voidReturns = array(
+            true => '$invocation->proceed();',
+            false => 'return $invocation->proceed();'
+        );
+
         foreach ($methods as $method) {
             $params = array();
             foreach ($method->getParameters() as $param) {
@@ -108,8 +112,11 @@ public function generate(\ReflectionClass $originalClass, PhpClass $genClass)
             }
             $params = implode(', ', $params);
 
-            $genMethod = PhpMethod::fromReflection($method)
-                ->setBody(sprintf($interceptorCode, var_export(ClassUtils::getUserClass($method->class), true), var_export($method->name, true), $params, $params))
+            $genMethod = PhpMethod::fromReflection($method);
+
+            $isVoid = 'void' === $genMethod->getReturnType();
+
+            $genMethod->setBody(sprintf($interceptorCode . $voidReturns[$isVoid], var_export(ClassUtils::getUserClass($method->class), true), var_export($method->name, true), $params, $params))
                 ->setDocblock(null)
             ;
             $genClass->setMethod($genMethod);