diff --git a/js/src/jit/MIROps.yaml b/js/src/jit/MIROps.yaml
index 96a41cc1caa9..d6075def524c 100644
--- a/js/src/jit/MIROps.yaml
+++ b/js/src/jit/MIROps.yaml
@@ -649,7 +649,6 @@
     wideningOp: wasm::FieldWideningOp
   type_policy: none
   result_type: Int32
-  movable: true
   congruent_to: if_operands_equal
   alias_set: none