diff --git a/chapters/install.xml b/chapters/install.xml
index 50f3731c02..fa844fafcd 100644
--- a/chapters/install.xml
+++ b/chapters/install.xml
@@ -765,6 +765,17 @@ $ php4-enable
       </para>
      </listitem>
     </varlistentry>
+    <varlistentry id="install.configure.with-fbsql">
+     <term>
+      <parameter>--with-fbsql</parameter>
+     </term>
+     <listitem>
+      <para>
+       PHP 3, PHP 4: Include FrontBase SQL support. DIR is the FrontBase base
+       install directory, defaults to usual Frontbase install dir.
+      </para>
+     </listitem>
+    </varlistentry>
     <varlistentry id="install.configure.with-gdbm">
      <term>
       <parameter>--with-gdbm[=DIR]</parameter>