diff --git a/reference/pdo/constants.xml b/reference/pdo/constants.xml
index f26fe4f47c..be672889f3 100644
--- a/reference/pdo/constants.xml
+++ b/reference/pdo/constants.xml
@@ -944,7 +944,7 @@ if ($db->getAttribute(PDO::ATTR_DRIVER_NAME) == 'mysql') {
     </simpara>
    </listitem>
   </varlistentry>
-  <varlistentry xml:id="pdo.constants.sqlite_deterministic">
+  <varlistentry xml:id="pdo.constants.sqlite-deterministic">
    <term>
     <constant>PDO::SQLITE_DETERMINISTIC</constant>
     (<type>int</type>)
diff --git a/reference/pdo_mysql/constants.xml b/reference/pdo_mysql/constants.xml
index 3cfdde4c5d..827d52f304 100644
--- a/reference/pdo_mysql/constants.xml
+++ b/reference/pdo_mysql/constants.xml
@@ -210,7 +210,7 @@ foreach ($unbufferedResult as $row) {
    </listitem>
   </varlistentry>
 
-  <varlistentry xml:id="pdo.constants.mysql-attr-cipher">
+  <varlistentry xml:id="pdo.constants.mysql-attr-ssl-cipher">
    <term>
     <constant>PDO::MYSQL_ATTR_SSL_CIPHER</constant>
      (<type>int</type>)
@@ -223,7 +223,7 @@ foreach ($unbufferedResult as $row) {
    </listitem>
   </varlistentry>
 
-  <varlistentry xml:id="pdo.constants.mysql-attr-key">
+  <varlistentry xml:id="pdo.constants.mysql-attr-ssl-key">
    <term>
     <constant>PDO::MYSQL_ATTR_SSL_KEY</constant>
      (<type>int</type>)