diff --git a/pymbolic/mapper/constant_converter.py b/pymbolic/mapper/constant_converter.py
index cc7f94eb9c4626a1a369f4e3d00292ab0055dce8..62e0a456ce18a4dcdf842c0f47912a12c8325717 100644
--- a/pymbolic/mapper/constant_converter.py
+++ b/pymbolic/mapper/constant_converter.py
@@ -44,8 +44,8 @@ class ConstantToNumpyConversionMapper(pymbolic.mapper.IdentityMapper):
                 complex_type = np.complex64
             elif real_type is np.float64:
                 complex_type = np.complex128
-            elif real_type is np.float128:
-                complex_type = np.complex256
+            elif real_type is np.float128:  # pylint:disable=no-member
+                complex_type = np.complex256  # pylint:disable-no-member
             else:
                 raise TypeError(
                         "unable to determine corresponding complex type for '%s'"