diff --git a/src/optype.rs b/src/optype.rs
index 5b66da5..98a3857 100644
--- a/src/optype.rs
+++ b/src/optype.rs
@@ -472,6 +472,7 @@ pub enum OpType {
     PhasePolyBox,
 
     /// NYI
+    #[serde(alias = "Condition")]
     Conditional,
 
     /// See [`StabiliserAssertionBox`]