diff --git a/reference/classobj/functions/get-class.xml b/reference/classobj/functions/get-class.xml
index ab2a6c81f2bc..affeee8085c4 100644
--- a/reference/classobj/functions/get-class.xml
+++ b/reference/classobj/functions/get-class.xml
@@ -23,7 +23,7 @@
      <term><parameter>object</parameter></term>
      <listitem>
       <para>
-       The tested object. This parameter may be omitted when inside a class.
+       The tested object.
       </para>
       <note>
        <simpara>
@@ -44,10 +44,6 @@
    Returns the name of the class of which <parameter>object</parameter> is an
    instance.
   </para>
-  <para>
-   If <parameter>object</parameter> is omitted when inside a class, the
-   name of that class is returned.
-  </para>
   <para>
    If the <parameter>object</parameter> is an instance of a class which exists 
    in a namespace, the qualified namespaced name of that class is returned.
@@ -78,6 +74,14 @@
       </row>
      </thead>
      <tbody>
+      <row>
+       <entry>8.3.0</entry>
+       <entry>
+        Calling <function>get_class</function> without an argument now emits an
+        <constant>E_DEPRECATED</constant> warning;
+        previously, calling this function inside a class returned the name of that class.
+       </entry>
+      </row>
       <row>
        <entry>8.0.0</entry>
        <entry>
diff --git a/reference/classobj/functions/get-parent-class.xml b/reference/classobj/functions/get-parent-class.xml
index 4a9a265bdbd1..f15a0fb37708 100644
--- a/reference/classobj/functions/get-parent-class.xml
+++ b/reference/classobj/functions/get-parent-class.xml
@@ -23,8 +23,7 @@
      <term><parameter>object_or_class</parameter></term>
      <listitem>
       <para>
-       The tested object or class name. This parameter is optional if called
-       from the object's method.
+       The tested object or class name.
       </para>
      </listitem>
     </varlistentry>
@@ -41,9 +40,6 @@
    If the object does not have a parent or the given class does not exist,
    &false; will be returned.
   </para>
-  <para>
-   If called without parameter outside object, this function returns &false;.
-  </para>
  </refsect1>
 
  <refsect1 role="changelog">
@@ -57,6 +53,14 @@
      </row>
     </thead>
     <tbody>
+     <row>
+      <entry>8.3.0</entry>
+      <entry>
+       Calling <function>get_class</function> without an argument now emits an
+       <constant>E_DEPRECATED</constant> warning;
+       previously, calling this function inside a class returned the name of that class.
+      </entry>
+     </row>
      <row>
       <entry>8.0.0</entry>
       <entry>