diff --git a/backends/cortex_m/passes/BUCK b/backends/cortex_m/passes/BUCK
index 4e49c8cd319..f1b7b9a201d 100644
--- a/backends/cortex_m/passes/BUCK
+++ b/backends/cortex_m/passes/BUCK
@@ -36,6 +36,7 @@ fbcode_target(_kind = runtime.python_library,
         "decompose_hardswish_pass.py",
         "decompose_mean_pass.py",
         "quantized_clamp_activation_pass.py",
+        "scratch_buffer_sizes.py",
     ],
     deps=[
         "//caffe2:torch",
diff --git a/backends/cortex_m/passes/convert_to_cortex_m_pass.py b/backends/cortex_m/passes/convert_to_cortex_m_pass.py
index e61ddaf63bc..5704645caf8 100644
--- a/backends/cortex_m/passes/convert_to_cortex_m_pass.py
+++ b/backends/cortex_m/passes/convert_to_cortex_m_pass.py
@@ -12,7 +12,7 @@
 import torch.fx
 from executorch.backends.arm._passes.arm_pass_utils import get_first_fake_tensor
 
-from executorch.backends.cortex_m.passes import CortexMPass
+from executorch.backends.cortex_m.passes.cortex_m_pass import CortexMPass
 from executorch.backends.cortex_m.passes.passes_utils import quantize_multiplier_aot
 from executorch.backends.cortex_m.passes.scratch_buffer_sizes import (
     required_cmsis_nn_buffer_sizes,