diff --git a/backends/arm/operators/op_permute.py b/backends/arm/operators/op_permute.py
index 92cc2b37479..6fb89d44210 100644
--- a/backends/arm/operators/op_permute.py
+++ b/backends/arm/operators/op_permute.py
@@ -111,13 +111,22 @@ def define_node(
         output: TosaArg,
     ) -> None:
         import serializer.tosa_serializer as ts
+        from executorch.backends.arm.tosa.specification import Tosa_1_00
 
         validate_num_inputs(self.target, inputs, 2)
         validate_same_dtype(self.target, [inputs[0], output], ts)
+
+        # Build list of valid dtypes based on TOSA spec
+        valid_dtypes = [ts.DType.INT8, ts.DType.INT32, ts.DType.FP32]
+        if isinstance(
+            output.tosa_spec, Tosa_1_00
+        ) and output.tosa_spec.support_extension("int16"):
+            valid_dtypes.append(ts.DType.INT16)
+
         validate_valid_dtype(
             self.target,
             [inputs[0], output],
-            [ts.DType.INT8, ts.DType.INT32, ts.DType.FP32],
+            valid_dtypes,
             output.tosa_spec,
         )