diff --git a/reference/pdo/constants.xml b/reference/pdo/constants.xml
index e8ad7652a0..91aaf1ee63 100644
--- a/reference/pdo/constants.xml
+++ b/reference/pdo/constants.xml
@@ -271,8 +271,8 @@
    </term>
    <listitem>
     <simpara>
-      Fetch into an array where the 1st column is a key and all subsequent
-      columns are values. Available since PHP 5.2.3.
+      Fetch a two-column result into an array where the first column is a key and the second column
+      is the value. Available since PHP 5.2.3.
     </simpara>
    </listitem>
   </varlistentry>