diff --git a/hphp/hack/src/hackc/ir/conversions/ir_to_bc/pusher.rs b/hphp/hack/src/hackc/ir/conversions/ir_to_bc/pusher.rs
index 68ddb25f2590fe..aad60c33406e48 100644
--- a/hphp/hack/src/hackc/ir/conversions/ir_to_bc/pusher.rs
+++ b/hphp/hack/src/hackc/ir/conversions/ir_to_bc/pusher.rs
@@ -69,6 +69,7 @@ pub(crate) fn run(func: Func) -> Func {
 }
 
 #[derive(Clone, Debug, Default, Eq, PartialEq)]
+#[allow(dead_code)]
 struct BlockInput {
     stack: Vec<ValueId>,
 }