diff --git a/examples/example_z.php b/examples/example_z.php
index df6f135..3e5ab05 100644
--- a/examples/example_z.php
+++ b/examples/example_z.php
@@ -5,7 +5,7 @@ class PartnerRepository extends SapFunction
 	#My system specific function, don't bother
 	const RFC_FUNCTION_NAME = 'Z_RFC_PARTNER_SELECT';
 	
-	public function getName()
+	public function getName() : string
 	{
 		return self::RFC_FUNCTION_NAME;
 	}
@@ -33,4 +33,4 @@ public function getPartners($vatnum)
 $partners = $partnerRepository->getPartners('123456789');
 
 print_r($partners);
-	
\ No newline at end of file
+