diff --git a/backends/arm/_passes/arm_pass_manager.py b/backends/arm/_passes/arm_pass_manager.py
index 50618f4c29a..3a0e75fad05 100644
--- a/backends/arm/_passes/arm_pass_manager.py
+++ b/backends/arm/_passes/arm_pass_manager.py
@@ -6,6 +6,8 @@
 # LICENSE file in the root directory of this source tree.
 
 # pyre-unsafe
+
+import executorch.backends.arm.tosa.dialect  # noqa: unused
 from executorch.backends.arm._passes import (
     AddBiasPass,
     AnnotateChannelsLastDimOrder,