diff --git a/reference/spl/functions/class-implements.xml b/reference/spl/functions/class-implements.xml
index 47307580d2..75652f63eb 100644
--- a/reference/spl/functions/class-implements.xml
+++ b/reference/spl/functions/class-implements.xml
@@ -4,7 +4,7 @@
class_implements
- Return the interfaces which are implemented by the given class
+ Return the interfaces which are implemented by the given class or interface
@@ -28,7 +28,7 @@
class
- An object (class instance) or a string (class name).
+ An object (class instance) or a string (class or interface name).