diff --git a/reference/pdo_cubrid/constants.xml b/reference/pdo_cubrid/constants.xml
index 1ab353269d..f54d055995 100644
--- a/reference/pdo_cubrid/constants.xml
+++ b/reference/pdo_cubrid/constants.xml
@@ -182,7 +182,7 @@
   </varlistentry>
   <varlistentry>
    <term>
-    <constant>PDO::CUBRID_SCH_ATTR_PRIMARY_KEY</constant>
+    <constant>PDO::CUBRID_SCH_PRIMARY_KEY</constant>
      (<type>integer</type>)
    </term>
    <listitem>