diff --git a/lib/workers/branch/index.js b/lib/workers/branch/index.js
index 9d5e799603fdb54441f16ebe1661d3e4a6f02f86..cac7713a42f1afdf10e472d952282a224877cb77 100644
--- a/lib/workers/branch/index.js
+++ b/lib/workers/branch/index.js
@@ -58,6 +58,9 @@ async function processBranch(branchConfig) {
       content +=
         '\n\nIf this PR was closed by mistake or you changed your mind, you can simply reopen or rename it to reactivate Renovate for this dependency version.';
       await platform.ensureComment(pr.number, subject, content);
+      if (await platform.branchExists(config.branchName)) {
+        await platform.deleteBranch(config.branchName);
+      }
       return 'already-existed';
     }
     logger.debug('Checking if PR has been edited');