diff --git a/lib/setup.php b/lib/setup.php
index 0db565c6a6..d7ceb36ae9 100644
--- a/lib/setup.php
+++ b/lib/setup.php
@@ -322,7 +322,7 @@ class OC_Setup {
 		if(!$connection) {
 			// Try if we can't connect with the specified DB name
 			$e_dbname = addslashes($dbname);
-			$connection_string = "host='$e_host' dbname='$dbname' user='$e_user' password='$e_password'";
+			$connection_string = "host='$e_host' dbname='$e_dbname' user='$e_user' password='$e_password'";
 			$connection = @pg_connect($connection_string);
 
 			if(!$connection)