1 files changed, 1 insertions, 0 deletions
diff --git a/LibMatrix/Helpers/RoomBuilder.cs b/LibMatrix/Helpers/RoomBuilder.cs
index 0db4e6f..cbb32c5 100644
--- a/LibMatrix/Helpers/RoomBuilder.cs
+++ b/LibMatrix/Helpers/RoomBuilder.cs
@@ -119,6 +119,7 @@ public class RoomBuilder {
         if (!IsFederatable)
             crq.CreationContent.Add("m.federate", false);
 
+        AdditionalCreators.RemoveAll(string.IsNullOrWhiteSpace);
         if (V12PlusRoomVersions.Contains(Version) && AdditionalCreators is { Count: > 0 }) {
             crq.CreationContent.Add("additional_creators", AdditionalCreators);
         }