diff --git a/dnn/src/naive/reduce/opr_impl.cpp b/dnn/src/naive/reduce/opr_impl.cpp
index 4d613a3fcb77d25b07a5dca63013008eb4ce18a5..4209f007cc6f1aeb8a26bc85bdb96adc1403b391 100644
--- a/dnn/src/naive/reduce/opr_impl.cpp
+++ b/dnn/src/naive/reduce/opr_impl.cpp
@@ -112,7 +112,6 @@ void reduce_fwd(
         }
 }
 
-#if !MGE_BUILD_WITHOUT_NAIVE_EXEC
 template <>
 void reduce_fwd<Mode::SUM>(
         const dt_quint8* __restrict, dt_quint8* __restrict, size_t, size_t, size_t) {
@@ -176,7 +175,6 @@ void reduce_fwd<Mode::PRODUCT>(
             "Reduce (PRODUCT) with DEFAULT DataType is not supported "
             "on QuantizedS8");
 }
-#endif
 
 template <Mode mode>
 void dispatch_dtype(
@@ -240,7 +238,6 @@ size_t ReduceForwardImpl::get_workspace_in_bytes(
 
 void ReduceForwardImpl::exec(
         _megdnn_tensor_in src, _megdnn_tensor_out dst, _megdnn_workspace workspace) {
-#if !MGE_BUILD_WITHOUT_NAIVE_EXEC
     using namespace reduce;
     check_exec(src.layout, dst.layout, workspace.size);
     size_t A, B, C;
@@ -307,9 +304,6 @@ void ReduceForwardImpl::exec(
             megdnn_assert_internal(false);
     }
 #undef CASE
-#else
-    __builtin_trap();
-#endif
 }
 
 }  // namespace naive
diff --git a/dnn/src/naive/type_cvt/opr_impl.cpp b/dnn/src/naive/type_cvt/opr_impl.cpp
index 85b5b4f071743bafca234d1addd23c312daf6a8a..3b2eb78d20ad87c9ccab84a3fd7d48897c94e012 100644
--- a/dnn/src/naive/type_cvt/opr_impl.cpp
+++ b/dnn/src/naive/type_cvt/opr_impl.cpp
@@ -78,7 +78,6 @@ void on_dest_ctype(HandleImpl* handle, const TensorND& dest, const TensorND& src
 }  // anonymous namespace
 
 void TypeCvtImpl::exec(_megdnn_tensor_in src, _megdnn_tensor_out dst) {
-#if !MGE_BUILD_WITHOUT_NAIVE_EXEC
     check_exec(src.layout, dst.layout);
 
     // exec
@@ -96,9 +95,6 @@ void TypeCvtImpl::exec(_megdnn_tensor_in src, _megdnn_tensor_out dst) {
 #undef cb
                         default : megdnn_throw("bad dtype");
     }
-#else
-    __builtin_trap();
-#endif
 }
 
 // vim: syntax=cpp.doxygen