diff --git a/language/types/boolean.xml b/language/types/boolean.xml
index 35f9d8ef62..b845e97639 100644
--- a/language/types/boolean.xml
+++ b/language/types/boolean.xml
@@ -8,12 +8,6 @@
   can be either &true; or &false;. 
  </simpara>
 
- <note>
-  <simpara>
-   The <type>boolean</type> type was introduced in PHP 4.
-  </simpara>
- </note>
-
  <sect2 xml:id="language.types.boolean.syntax">
   <title>Syntax</title>
   <para>
diff --git a/reference/iisfunc/book.xml b/reference/iisfunc/book.xml
index 3201a83b7b..5732b021a1 100644
--- a/reference/iisfunc/book.xml
+++ b/reference/iisfunc/book.xml
@@ -14,7 +14,6 @@
    to administrate Microsoft Internet Information Server (IIS).
    The extension includes function to create web sites and virtual
    directories as well as configuring security and script mapping.
-   These functions have been added in PHP 4.
   </para>
  </preface>
  <!-- }}} -->