diff --git a/releng/CDT.setup b/releng/CDT.setup
index b1d737bf7d6..0089b0a36b1 100644
--- a/releng/CDT.setup
+++ b/releng/CDT.setup
@@ -205,7 +205,7 @@
       xsi:type="git:GitCloneTask"
       id="github.clone.cdt-lsp"
       remoteURI="eclipse-cdt/cdt-lsp"
-      checkoutBranch="master">
+      checkoutBranch="main">
     <annotation
         source="http://www.eclipse.org/oomph/setup/InducedChoices">
       <detail