diff --git a/lib/platform/gitlab/index.ts b/lib/platform/gitlab/index.ts
index 5bebabb596eaca00b3252a8c1e04eda58ed55471..8ad85fc8116c01559cede08569bd29527bc4882b 100644
--- a/lib/platform/gitlab/index.ts
+++ b/lib/platform/gitlab/index.ts
@@ -520,7 +520,7 @@ export async function updatePr({
   state,
 }: UpdatePrConfig): Promise<void> {
   let title = prTitle;
-  if ((await getPrList()).find((pr) => pr.number === iid).isDraft) {
+  if ((await getPrList()).find((pr) => pr.number === iid)?.isDraft) {
     title = draftPrefix + title;
   }
   const newState = {