diff --git a/libs/geography/driver/src/interfaces/geography-service.interface.ts b/libs/geography/driver/src/interfaces/geography-service.interface.ts
index c0d60ea475..45da71507f 100644
--- a/libs/geography/driver/src/interfaces/geography-service.interface.ts
+++ b/libs/geography/driver/src/interfaces/geography-service.interface.ts
@@ -3,9 +3,9 @@ import { Observable } from 'rxjs';
 
 import { DaffCountry } from '@daffodil/geography';
 
-export const DaffGeographyDriver = new InjectionToken('DaffGeographyDriver');
+export const DaffGeographyDriver = new InjectionToken<DaffGeographyServiceInterface>('DaffGeographyDriver');
 
-export interface DaffGeographyServiceInterface<T extends DaffCountry> {
+export interface DaffGeographyServiceInterface<T extends DaffCountry = DaffCountry> {
 	/**
 	 * Retrieves the list of countries available to the given store.
 	 */