diff --git a/app/api/songs/batch/route.ts b/app/api/songs/batch/route.ts
index 3bce117..3f3583a 100644
--- a/app/api/songs/batch/route.ts
+++ b/app/api/songs/batch/route.ts
@@ -84,8 +84,9 @@ export async function POST(request: Request) {
             assignments = await getCuratorAssignments(context.curator.id);
 
             // Validate genre/special toggles are within curator's assignments
+            // assignments is guaranteed to be non-null here since we're in the curator block
             if (hasGenreToggle) {
-                const invalidGenre = genreToggleIds.some((id: number) => !assignments.genreIds.has(id));
+                const invalidGenre = genreToggleIds.some((id: number) => !assignments!.genreIds.has(id));
                 if (invalidGenre) {
                     return NextResponse.json(
                         { error: 'Curators may only toggle their own genres' },
@@ -95,7 +96,7 @@ export async function POST(request: Request) {
             }
 
             if (hasSpecialToggle) {
-                const invalidSpecial = specialToggleIds.some((id: number) => !assignments.specialIds.has(id));
+                const invalidSpecial = specialToggleIds.some((id: number) => !assignments!.specialIds.has(id));
                 if (invalidSpecial) {
                     return NextResponse.json(
                         { error: 'Curators may only toggle their own specials' },