diff --git a/lib/Updater.php b/lib/Updater.php
index 96322949..5bd6eefc 100644
--- a/lib/Updater.php
+++ b/lib/Updater.php
@@ -60,9 +60,10 @@ public function __construct(
 			}
 		}
 
+		//check for update or data directories
 		$dataDir = $this->getUpdateDirectoryLocation();
 		if ($dataDir === '' || $dataDir === '0') {
-			throw new \Exception('Could not read data directory from config.php.');
+			throw new \Exception('Could not read update or data directory from config.php.');
 		}
 
 		$versionFileName = $this->nextcloudDir . '/version.php';