diff --git a/src/awkward/contents/emptyarray.py b/src/awkward/contents/emptyarray.py
index e2edce2672..775d757f09 100644
--- a/src/awkward/contents/emptyarray.py
+++ b/src/awkward/contents/emptyarray.py
@@ -98,7 +98,7 @@ def __deepcopy__(self, memo):
 
     def __array__(self, dtype=None):
         deprecate(
-            f"np.asarray(content) is deprecated for {type(self)}. Use ak.to_numpy(content) instead",
+            f"np.asarray(content) is deprecated for {type(self).__name__}. Use ak.to_numpy(content) instead",
             version="2.6.0",
         )
         return numpy.empty(0, dtype=dtype)
diff --git a/src/awkward/contents/numpyarray.py b/src/awkward/contents/numpyarray.py
index 787e01e801..1b39cc822b 100644
--- a/src/awkward/contents/numpyarray.py
+++ b/src/awkward/contents/numpyarray.py
@@ -154,7 +154,7 @@ def __deepcopy__(self, memo):
 
     def __array__(self, dtype=None):
         deprecate(
-            f"np.asarray(content) is deprecated for {type(self)}. Use ak.to_numpy(content) instead",
+            f"np.asarray(content) is deprecated for {type(self).__name__}. Use ak.to_numpy(content) instead",
             version="2.6.0",
         )
         return numpy.asarray(self._data, dtype=dtype)