diff --git a/posts.py b/posts.py
index 0f7789111..0ebcc2529 100644
--- a/posts.py
+++ b/posts.py
@@ -1066,18 +1066,18 @@ def _createPostBase(baseDir: str, nickname: str, domain: str, port: int,
                     mediaType: str, imageDescription: str, city: str,
                     isModerationReport: bool,
                     isArticle: bool,
-                    inReplyTo: str = None,
-                    inReplyToAtomUri: str = None,
-                    subject: str = None, schedulePost: bool = False,
-                    eventDate: str = None, eventTime: str = None,
-                    location: str = None,
-                    eventUUID: str = None, category: str = None,
-                    joinMode: str = None,
-                    endDate: str = None, endTime: str = None,
-                    maximumAttendeeCapacity: int = None,
-                    repliesModerationOption: str = None,
-                    anonymousParticipationEnabled: bool = None,
-                    eventStatus: str = None, ticketUrl: str = None) -> {}:
+                    inReplyTo: str,
+                    inReplyToAtomUri: str,
+                    subject: str, schedulePost: bool,
+                    eventDate: str, eventTime: str,
+                    location: str,
+                    eventUUID: str, category: str,
+                    joinMode: str,
+                    endDate: str, endTime: str,
+                    maximumAttendeeCapacity: int,
+                    repliesModerationOption: str,
+                    anonymousParticipationEnabled: bool,
+                    eventStatus: str, ticketUrl: str) -> {}:
     """Creates a message
     """
     content = removeInvalidChars(content)