diff --git a/src/relay/op/tensor/unary.cc b/src/relay/op/tensor/unary.cc
index 9922ca3d22125..c90ae3acbe333 100644
--- a/src/relay/op/tensor/unary.cc
+++ b/src/relay/op/tensor/unary.cc
@@ -534,6 +534,7 @@ RELAY_REGISTER_OP("accelerator_call")
     .set_attr<String>("AcceleratorFunc", "unknown")
     .set_attr<Array<Integer>>("OutputShape", {})
     .set_support_level(10)
+    .set_attr<TOpPattern>("TOpPattern", kOpaque)
     .add_type_rel("AcceleratorCall", AcceleratorCallRel);
 
 RELAY_REGISTER_UNARY_OP("isnan")