diff --git a/reference/reflection/reflectionclass/issubclassof.xml b/reference/reflection/reflectionclass/issubclassof.xml
index 642dc08a47..95e54d1961 100644
--- a/reference/reflection/reflectionclass/issubclassof.xml
+++ b/reference/reflection/reflectionclass/issubclassof.xml
@@ -11,7 +11,7 @@
&reftitle.description;
public boolReflectionClass::isSubclassOf
- stringclass
+ mixedclass
Checks if the class is a subclass of a specified class or implements
@@ -27,7 +27,8 @@
class
- The class name being checked against.
+ Either the name of the class as string or
+ a ReflectionClass object of the class to check against.