diff --git a/lib/backend/abstractbackend.php b/lib/backend/abstractbackend.php
index eb8737a7..be29463e 100644
--- a/lib/backend/abstractbackend.php
+++ b/lib/backend/abstractbackend.php
@@ -457,4 +457,8 @@ abstract class AbstractBackend {
 			? \OCP\Config::setUserValue($this->userid, 'contacts', $key, $data)
 			: false;
 	}
+
+	public function getSearchProvider($addressbook) {
+	}
+
 }
diff --git a/lib/backend/database.php b/lib/backend/database.php
index 2a0e9a04..f9a16606 100644
--- a/lib/backend/database.php
+++ b/lib/backend/database.php
@@ -1018,9 +1018,9 @@ class Database extends AbstractBackend {
 
 		return self::$preparedQueries[$identifier];
 	}
-    
-    public function getSearchProvider($addressbook){
-	return new \OCA\Contacts\AddressbookProvider($addressbook);
-    }
+
+	public function getSearchProvider($addressbook) {
+		return new \OCA\Contacts\AddressbookProvider($addressbook);
+	}
 	
 }