diff --git a/src/Appwrite/Platform/Modules/Functions/Workers/Builds.php b/src/Appwrite/Platform/Modules/Functions/Workers/Builds.php
index b3d11d8b54..de5543c9f3 100644
--- a/src/Appwrite/Platform/Modules/Functions/Workers/Builds.php
+++ b/src/Appwrite/Platform/Modules/Functions/Workers/Builds.php
@@ -1135,7 +1135,7 @@ class Builds extends Action
                     $branchPrefix = substr($branchName, 0, 16);
                     if (strlen($branchName) > 16) {
                         $remainingChars = substr($branchName, 16);
-                        $branchPrefix .= substr(hash('sha256', $remainingChars), 0, 7);
+                        $branchPrefix .= '-' . substr(hash('sha256', $remainingChars), 0, 7);
                     }
                     $resourceProjectHash = substr(hash('sha256', $resource->getId() . $project->getId()), 0, 7);
                     $domain = "branch-{$branchPrefix}-{$resourceProjectHash}.{$sitesDomain}";