diff --git a/tofu/geom/_core.py b/tofu/geom/_core.py
index 7bb2d9014..71d72c58d 100644
--- a/tofu/geom/_core.py
+++ b/tofu/geom/_core.py
@@ -423,7 +423,7 @@ def _checkformat_inputs_dreflect(self, Types=None, coefs=None):
             Typesu = np.unique(Types)
             lc = np.array([Typesu == vv
                            for vv in self._DREFLECT_DTYPES.values()])
-            assert np.all(np.any(Types, axis=0))
+            assert np.all(np.any(lc, axis=0))
 
         assert coefs is None
         return Types, coefs
diff --git a/tofu/version.py b/tofu/version.py
index 131f008cd..415551848 100644
--- a/tofu/version.py
+++ b/tofu/version.py
@@ -1,2 +1,2 @@
 # Do not edit, pipeline versioning governed by git tags!
-__version__ = '1.4.1-49-g373fc3c'
+__version__ = '1.4.1-51-g96c8cd8'