diff --git a/lib/workers/pr/index.js b/lib/workers/pr/index.js
index <HASH>..<HASH> 100644
--- a/lib/workers/pr/index.js
+++ b/lib/workers/pr/index.js
@@ -237,7 +237,7 @@ async function ensurePr(prConfig) {
         logger.debug(
           {
             prTitle,
-            oldPrBody: existingPr.body,
+            oldPrBody: existingPrBody,
             newPrBody: prBody,
           },
           'PR body changed'
refactor: fix oldPrBody log