diff --git a/python/CuTeDSL/cutlass/base_dsl/_mlir_helpers/arith.py b/python/CuTeDSL/cutlass/base_dsl/_mlir_helpers/arith.py
index 0107014002..230eea9c03 100644
--- a/python/CuTeDSL/cutlass/base_dsl/_mlir_helpers/arith.py
+++ b/python/CuTeDSL/cutlass/base_dsl/_mlir_helpers/arith.py
@@ -360,7 +360,8 @@ def wrapper(self, other, **kwargs):
 def _binary_op(op):
     """
     Decorator to check if the 'other' argument is an ArithValue.
-    If not, returns NotImplemented.
+    If 'other' is a Python scalar (int, float, bool), it is cast to a constant 
+    MLIR value matching the type and signedness of 'self'.
     """
 
     def wrapper(self, other, **kwargs):