diff --git a/mycaldav/models.py b/mycaldav/models.py
index 307c913..b82994f 100644
--- a/mycaldav/models.py
+++ b/mycaldav/models.py
@@ -94,7 +94,7 @@ class cls_caldav():
                     item.key = item.key.replace("$","")
                 if "Manif" in item.key:
                     item.team_manif = True
-                    item.key = item.key.replace("manif", "")
+                    item.key = item.key.replace("Manif", "")
                 item.name = arr[1]
             if "&" in item.name:
                 arr = item.name.split("&")