diff --git a/reference/memcache/memcache/addserver.xml b/reference/memcache/memcache/addserver.xml
index df64029f4b..6713a4771c 100644
--- a/reference/memcache/memcache/addserver.xml
+++ b/reference/memcache/memcache/addserver.xml
@@ -165,6 +165,20 @@
   </para>
  </refsect1>
 
+ <refsect1 role="notes">
+  &reftitle.notes;
+  <warning>
+   <para>
+    When the <parameter>port</parameter> is unspecified, this method defaults to the
+    value set of the PHP ini directive
+    <link linkend="ini.memcache.default-port">memcache.default_port</link>
+    If this value was changed elsewhere in your application it might lead to
+    unexpected results: for this reason it is wise to always specify the port
+    explicitly in this method call.
+   </para>
+  </warning>
+ </refsect1>
+
  <refsect1 role="returnvalues">
   &reftitle.returnvalues;
   <para>
@@ -172,7 +186,7 @@
   </para>
  </refsect1>
 
- <refsect1 role="examples">
+<refsect1 role="examples">
   &reftitle.examples;
   <para>
    <example>
diff --git a/reference/memcache/memcache/connect.xml b/reference/memcache/memcache/connect.xml
index b0e76699e3..23fe70f693 100644
--- a/reference/memcache/memcache/connect.xml
+++ b/reference/memcache/memcache/connect.xml
@@ -71,6 +71,20 @@
   </para>
  </refsect1>
 
+ <refsect1 role="notes">
+  &reftitle.notes;
+  <warning>
+   <para>
+    When the <parameter>port</parameter> is unspecified, this method defaults to the
+    value set of the PHP ini directive
+    <link linkend="ini.memcache.default-port">memcache.default_port</link>
+    If this value was changed elsewhere in your application it might lead to
+    unexpected results: for this reason it is wise to always specify the port
+    explicitly in this method call.
+   </para>
+  </warning>
+ </refsect1>
+
  <refsect1 role="returnvalues">
   &reftitle.returnvalues;
   <para>