diff --git a/src/Core/Update.php b/src/Core/Update.php
index 5df0675cda..ed6c058726 100644
--- a/src/Core/Update.php
+++ b/src/Core/Update.php
@@ -94,7 +94,7 @@ class Update
 
 					// update the structure in one call
 					$retval = DBStructure::update($basePath, $verbose, true);
-					if ($retval) {
+					if (!empty($retval)) {
 						if ($sendMail) {
 							self::updateFailed(
 								DB_UPDATE_VERSION,