diff --git a/axengine/_axclrt.py b/axengine/_axclrt.py
index 731186f..e07fa59 100644
--- a/axengine/_axclrt.py
+++ b/axengine/_axclrt.py
@@ -377,13 +377,13 @@ def run(
                 ret = axclrt_lib.axclrtEngineGetOutputBufferByIndex(self._io[0], i, dev_prt, dev_size)
                 if 0 != ret:
                     raise RuntimeError(f"axclrtEngineGetOutputBufferByIndex failed for output {i}.")
+                buffer_addr = dev_prt[0]
                 npy_size = self.get_outputs(shape_group)[i].dtype.itemsize * np.prod(self.get_outputs(shape_group)[i].shape)
-                npy = np.frombuffer(
-                    axclrt_cffi.buffer(
-                        self._io[0].pOutputs[i].pVirAddr, npy_size
-                    ),
-                    dtype=self.get_outputs(shape_group)[i].dtype,
-                ).reshape(self.get_outputs(shape_group)[i].shape)
+                npy = np.zeros(self.get_outputs(shape_group)[i].shape, dtype=self.get_outputs(shape_group)[i].dtype)
+                npy_ptr = axclrt_cffi.cast("void *", npy.ctypes.data)
+                ret = axclrt_lib.axclrtMemcpy(npy_ptr, buffer_addr, npy_size, axclrt_lib.AXCL_MEMCPY_DEVICE_TO_HOST)
+                if 0 != ret:
+                    raise RuntimeError(f"axclrtMemcpy failed for output {i}.")
                 name = self.get_outputs(shape_group)[i].name
                 if name in output_names:
                     outputs.append(npy)