diff --git a/main.py b/main.py
index d95cfb6..08caf10 100644
--- a/main.py
+++ b/main.py
@@ -86,10 +86,10 @@ def get_slot_key_for_event(event: dict):
     
     w = ""
     if weeknum is not None:
-        w = "_WN" + str(weeknum)
+        w += "_WN" + str(weeknum)
         
     if weekday is not None:
-        w = "_WD" + str(weekday)
+        w += "_WD" + str(weekday)
     
     r = ('_'.join(pairs)) + ("_".join(times))
     if len(r) > 0: r = "_" + r