diff --git a/src/components/Author/AuthorBadge/AuthorBadge.tsx b/src/components/Author/AuthorBadge/AuthorBadge.tsx
index ceefc18f..ee73006f 100644
--- a/src/components/Author/AuthorBadge/AuthorBadge.tsx
+++ b/src/components/Author/AuthorBadge/AuthorBadge.tsx
@@ -43,7 +43,7 @@ export const AuthorBadge = (props: Props) => {
   const { changeSearchParams } = useRouter()
   const { t, formatDate, lang } = useLocalize()
   const subscribed = createMemo(() =>
-    subscriptions().authors.some((a: Author) => a.slug === props.author.slug),
+    subscriptions().authors.some((a: Author) => a && a.slug === props.author.slug),
   )
 
   const subscribe = async (really = true) => {
diff --git a/src/components/Author/AuthorCard/AuthorCard.tsx b/src/components/Author/AuthorCard/AuthorCard.tsx
index 670ad8df..4170d055 100644
--- a/src/components/Author/AuthorCard/AuthorCard.tsx
+++ b/src/components/Author/AuthorCard/AuthorCard.tsx
@@ -43,7 +43,7 @@ export const AuthorCard = (props: Props) => {
   const [subscriptionFilter, setSubscriptionFilter] = createSignal<SubscriptionFilter>('all')
 
   const subscribed = createMemo<boolean>(() =>
-    subscriptions().authors.some((a: Author) => a.slug === props.author.slug),
+    subscriptions().authors.some((a: Author) => a && a.slug === props.author.slug),
   )
 
   const subscribe = async (really = true) => {