diff --git a/packages/optimizely-sdk/lib/shared_types.ts b/packages/optimizely-sdk/lib/shared_types.ts
index 088222f14..6b42f8bf3 100644
--- a/packages/optimizely-sdk/lib/shared_types.ts
+++ b/packages/optimizely-sdk/lib/shared_types.ts
@@ -207,6 +207,8 @@ export interface SDKOptions {
   sdkKey?: string;
   // user profile that contains user information
   userProfileService?: UserProfileService;
+  // dafault options for decide API
+  defaultDecideOptions?: OptimizelyDecideOption[];
 }
 
 export type OptimizelyExperimentsMap = {