diff --git a/srcs/requirements/nestjs/api_back/src/chat/chat.service.ts b/srcs/requirements/nestjs/api_back/src/chat/chat.service.ts
index a97d9004..5de334f5 100644
--- a/srcs/requirements/nestjs/api_back/src/chat/chat.service.ts
+++ b/srcs/requirements/nestjs/api_back/src/chat/chat.service.ts
@@ -375,7 +375,9 @@ export class ChatService {
 
 		let user = await this.getUserByName(username);
 		let friends_users = await this.friendshipService.findAllBlockedFriends(user.id);
-		let users = friends_users.map(user => user.receiverUsername);
+		let users: string[];
+		if (friends_users)
+			users = friends_users.map(user => user.receiverUsername);
 
 		printCaller("-- out ");
 		return users;