diff --git a/UI/Wikipedia/WikidataPreviewBox.ts b/UI/Wikipedia/WikidataPreviewBox.ts
index 525e102b5..b54ec1e18 100644
--- a/UI/Wikipedia/WikidataPreviewBox.ts
+++ b/UI/Wikipedia/WikidataPreviewBox.ts
@@ -138,10 +138,11 @@ export default class WikidataPreviewBox extends VariableUiElement {
 
             const key = extraProperty.property
             const display = extraProperty.display
-            const value: string[] = Array.from(wikidata.claims.get(key))
-            if (value === undefined) {
+            if (wikidata.claims?.get(key) === undefined) {
                 continue
             }
+            const value: string[] = Array.from(wikidata.claims.get(key))
+           
             if (display instanceof Translation) {
                 els.push(display.Subs({value: value.join(", ")}).SetClass("m-2"))
                 continue