diff --git a/reference/zip/ziparchive/extractto.xml b/reference/zip/ziparchive/extractto.xml
index e724b58bc4..7edb5e8c7f 100644
--- a/reference/zip/ziparchive/extractto.xml
+++ b/reference/zip/ziparchive/extractto.xml
@@ -16,6 +16,14 @@
    Extract the complete archive or the given files to the specified
    destination.
   </para>
+  <warning>
+   <para>
+      The default permissions for extracted files and directories
+      give the widest possible access. This can be restricted
+      by setting the current umask, which you can change using
+      <function>umask</function>.
+   </para>
+  </warning>
  </refsect1>
  <refsect1 role="parameters">
   &reftitle.parameters;