diff --git a/concrete/common/mlir/utils.py b/concrete/common/mlir/utils.py
index ee3c0dd1a..4ddb6db09 100644
--- a/concrete/common/mlir/utils.py
+++ b/concrete/common/mlir/utils.py
@@ -90,6 +90,9 @@ def check_node_compatibility_with_mlir(
                 if node.op_name == "TLU":  # pragma: no cover
                     return "only unsigned integer lookup tables are supported"
 
+                if node.op_name.startswith("astype"):
+                    return f"{node.op_name} is not supported without fusing"
+
                 # e.g., `np.absolute is not supported for the time being`
                 return f"{node.op_name} is not supported for the time being"
         else:
diff --git a/tests/numpy/test_compile.py b/tests/numpy/test_compile.py
index 161e0d852..b2f92c30d 100644
--- a/tests/numpy/test_compile.py
+++ b/tests/numpy/test_compile.py
@@ -1074,7 +1074,7 @@ function you are trying to compile isn't supported for MLIR lowering
 %8 = Mul(%7, %0)                                   # EncryptedScalar<Float<64 bits>>
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ only integer multiplication is supported
 %9 = astype(int32)(%8)                             # EncryptedScalar<Integer<signed, 5 bits>>
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ astype(int32) is not supported for the time being
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ astype(int32) is not supported without fusing
 return(%9)
 """.lstrip()  # noqa: E501
             ),