diff --git a/csrc/device_lower/pass/allocation.cpp b/csrc/device_lower/pass/allocation.cpp
index 346c59a1a08..7a65be53d9b 100644
--- a/csrc/device_lower/pass/allocation.cpp
+++ b/csrc/device_lower/pass/allocation.cpp
@@ -508,10 +508,10 @@ class AllocationInserter : public kir::ExprMutator {
         init = default_val;
       }
 
-      if (ir_utils::isCpAsyncOp(expr)) {
+      if (ir_utils::isCpAsyncOp(expr) || ir_utils::isCpAsyncBulk(expr)) {
         NVF_CHECK(
             init == nullptr || init->isZero(),
-            "cp.async initialized with non-zero is not supported");
+            "cp.async and cp.async.bulk initialized with non-zero is not supported");
         // cp.async will automatically fill zero when out of bound
         init = nullptr;
       }
diff --git a/tests/cpp/test_matmul.cpp b/tests/cpp/test_matmul.cpp
index 9f4fd14cfa0..239843f52eb 100644
--- a/tests/cpp/test_matmul.cpp
+++ b/tests/cpp/test_matmul.cpp
@@ -3624,9 +3624,8 @@ TEST_F(HopperMatmulTest, HSH_NT_128BSwizzle) {
 
   inlineMost();
 
-  // TODO: looks like this test will hang if I enable this
-  // tv0c->circularBuffer(/*number_of_stages=*/4);
-  // tv1c->circularBuffer(/*number_of_stages=*/4);
+  tv0c->circularBuffer(/*number_of_stages=*/4);
+  tv1c->circularBuffer(/*number_of_stages=*/4);
 
   auto inputs =
       matmulAtInput3DHopperSS(M, N, K, layout, data_type_to_aten(dtype));