diff --git a/lib/platform/bitbucket-server/index.js b/lib/platform/bitbucket-server/index.js
index f8737c52cf988e72968624936606636b1cbaa74d..c2a716a558a32a3e81cd135f82dda3a9b598ccea 100644
--- a/lib/platform/bitbucket-server/index.js
+++ b/lib/platform/bitbucket-server/index.js
@@ -732,6 +732,10 @@ async function getPr(prNo, refreshCache) {
     pr.canRebase = true;
   }
 
+  if (await branchExists(pr.branchName)) {
+    res.isStale = await isBranchStale(pr.branchName);
+  }
+
   return pr;
 }