diff --git a/src/types.ts b/src/types.ts
index 794eb39..37c1910 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -291,7 +291,7 @@ interface ICourseContent<T extends ContentType> {
   [id: string]: ContentTypeMap[T][];
 }
 
-export type CourseContent<T extends ContentType> = ICourseContent<T>;
+export type CourseContent<T extends ContentType = ContentType> = ICourseContent<T>;
 
 export interface CalendarEvent {
   location: string;