diff --git a/UPGRADE.md b/UPGRADE.md
index 784e1cd47c1..a8f2b32779c 100644
--- a/UPGRADE.md
+++ b/UPGRADE.md
@@ -4,6 +4,7 @@
 
 The non-interface method of driver-level classes have been marked internal:
 
+- `OCI8Connection::getExecuteMode()`
 - `OCI8Statement::convertPositionalToNamedPlaceholders()`
 
 ## Inconsistently and ambiguously named driver-level classes are deprecated
diff --git a/lib/Doctrine/DBAL/Driver/OCI8/OCI8Connection.php b/lib/Doctrine/DBAL/Driver/OCI8/OCI8Connection.php
index b636b362cf2..2ee1e365fc3 100644
--- a/lib/Doctrine/DBAL/Driver/OCI8/OCI8Connection.php
+++ b/lib/Doctrine/DBAL/Driver/OCI8/OCI8Connection.php
@@ -176,6 +176,8 @@ public function lastInsertId($name = null)
     /**
      * Returns the current execution mode.
      *
+     * @internal
+     *
      * @return int
      */
     public function getExecuteMode()