diff --git a/slaeforms/app.py b/slaeforms/app.py
index 79b5c1c..b5288c0 100644
--- a/slaeforms/app.py
+++ b/slaeforms/app.py
@@ -191,9 +191,10 @@ def startpage():
                         case "single_video": 
                             order = list(config[name]["stimuli"]["list"]) # order = list of simuli keys
                             print("order: ",order)
-                            if config[name]["stimuli"]["order"] == "random":
-                                random.shuffle(order) #in random order
-                            session["block_order"][name] = order
+                            if "order" in config[name]["stimuli"]:
+                                if config[name]["stimuli"]["order"] == "random":
+                                    random.shuffle(order) #in random order
+                                session["block_order"][name] = order
                         case "double_video": 
                             order = [] # order = list of stimuli keys
                             list_1 = list(config[name]["stimuli"]["list_1"])