diff --git a/drb-frontend/lib/c2api.ts b/drb-frontend/lib/c2api.ts
index cdbb884..3bcef8c 100644
--- a/drb-frontend/lib/c2api.ts
+++ b/drb-frontend/lib/c2api.ts
@@ -96,7 +96,7 @@ export const c2api = {
 
   // Vocabulary
   getVocabulary: (systemId: string) =>
-    request<{ vocabulary: string[]; vocabulary_pending: { term: string; source: string; added_at: string }[]; vocabulary_bootstrapped: boolean }>(
+    request<{ vocabulary: string[]; vocabulary_pending: { term: string; source: "induction" | "correction"; added_at: string }[]; vocabulary_bootstrapped: boolean }>(
       `/systems/${systemId}/vocabulary`
     ),
   bootstrapVocabulary: (systemId: string) =>