diff --git a/polygerrit-ui/app/elements/change/gr-submit-requirement-hovercard/gr-submit-requirement-hovercard.ts b/polygerrit-ui/app/elements/change/gr-submit-requirement-hovercard/gr-submit-requirement-hovercard.ts
index 002ac56..74f430c 100644
--- a/polygerrit-ui/app/elements/change/gr-submit-requirement-hovercard/gr-submit-requirement-hovercard.ts
+++ b/polygerrit-ui/app/elements/change/gr-submit-requirement-hovercard/gr-submit-requirement-hovercard.ts
@@ -236,7 +236,7 @@
     name: string,
     expression?: SubmitRequirementExpressionInfo
   ) {
-    if (!expression) return '';
+    if (!expression?.expression) return '';
     return html`
       <div class="section">
         <div class="sectionIcon"></div>