diff --git a/src/core/matrix/pdu/unsigned.rs b/src/core/matrix/pdu/unsigned.rs
index 9c3197245..cf3e5e1f1 100644
--- a/src/core/matrix/pdu/unsigned.rs
+++ b/src/core/matrix/pdu/unsigned.rs
@@ -86,5 +86,7 @@ pub fn set_unsigned(
 					.expect("sticky event TTL must be a valid JSON value for unsigned"),
 			);
 		}
+
+		self.unsigned = Some(to_raw_value(&unsigned).unwrap());
 	}
 }