diff --git a/lib/os/class.ISPConfigDebianOS.inc.php b/lib/os/class.ISPConfigDebianOS.inc.php
index 309971d27cbb89ca0ccfaa9955f4b7a500590496..ef917c320365eb0697516e761f2e39f9e9cb835a 100644
--- a/lib/os/class.ISPConfigDebianOS.inc.php
+++ b/lib/os/class.ISPConfigDebianOS.inc.php
@@ -331,8 +331,9 @@ Alias /phpmyadmin /usr/share/phpmyadmin
 		$pma_pass_enc = preg_replace('/[\'\\\\]/', '\\$1', $pma_pass);
 
 		$queries = array(
-			'CREATE DATABASE phpmyadmin;',
-			'CREATE USER \'pma\'@\'localhost\' IDENTIFIED BY \'' . $pma_pass_enc . '\';',
+			'CREATE DATABASE IF NOT EXISTS phpmyadmin;',
+			'CREATE USER IF NOT EXISTS \'pma\'@\'localhost\';',
+			'ALTER USER \'pma\'@\'localhost\' IDENTIFIED BY \'' . $pma_pass_enc . '\';',
 			'GRANT ALL PRIVILEGES ON phpmyadmin.* TO \'pma\'@\'localhost\' IDENTIFIED BY \'' . $pma_pass_enc . '\' WITH GRANT OPTION;',
 			'FLUSH PRIVILEGES;'
 		);