diff --git a/truthseeker/logic/game_logic.py b/truthseeker/logic/game_logic.py
index e0ed3a1..c443bf3 100644
--- a/truthseeker/logic/game_logic.py
+++ b/truthseeker/logic/game_logic.py
@@ -50,6 +50,7 @@ class Game:
         self.game_id = None
         self.owner = None
         self.members = []
+        self.has_started = True
 
     def set_owner(self, username):
         self.owner = Member(username)
diff --git a/truthseeker/routes/routes_api.py b/truthseeker/routes/routes_api.py
index 76180d4..5a1f3ee 100644
--- a/truthseeker/routes/routes_api.py
+++ b/truthseeker/routes/routes_api.py
@@ -54,7 +54,16 @@ def start_game():
         return {"error": 1, "msg": "No session"}
     if not flask.session["is_owner"]:
         return {"error": 1, "msg": "you are not the owner of this game"}
-    if game_logic.get_game(flask.session["game_id"]) == None:
+    
+    game = game_logic.get_game(flask.session["game_id"])
+
+    if game == None:
         return {"error": 1, "msg": "this game doesn't exist"}
+    if game.has_started:
+        return {"error": 1, "msg": "this game is already started"}
+
+    game.has_started = None
+
+    
     
     return {"error": 0}