diff --git a/lib/private/DB/ConnectionAdapter.php b/lib/private/DB/ConnectionAdapter.php
index d2808bb0295..8c1a2c79d6b 100644
--- a/lib/private/DB/ConnectionAdapter.php
+++ b/lib/private/DB/ConnectionAdapter.php
@@ -178,6 +178,7 @@ class ConnectionAdapter implements IDBConnection {
 
 	/**
 	 * @todo we are leaking a 3rdparty type here
+	 * @deprecated 30.0.0 Use {@see getDatabaseProvider()} instead
 	 */
 	public function getDatabasePlatform(): AbstractPlatform {
 		return $this->inner->getDatabasePlatform();
diff --git a/lib/public/IDBConnection.php b/lib/public/IDBConnection.php
index a5df85896e2..1c1e0a0e869 100644
--- a/lib/public/IDBConnection.php
+++ b/lib/public/IDBConnection.php
@@ -278,6 +278,7 @@ interface IDBConnection {
 	 *
 	 * @return \Doctrine\DBAL\Platforms\AbstractPlatform The database platform.
 	 * @since 8.0.0
+	 * @deprecated 30.0.0 Use {@see getDatabaseProvider()} instead
 	 */
 	public function getDatabasePlatform();