diff --git a/tensorboard/compat/tensorflow_stub/dtypes.py b/tensorboard/compat/tensorflow_stub/dtypes.py
index 50da1320ad..b13762908c 100644
--- a/tensorboard/compat/tensorflow_stub/dtypes.py
+++ b/tensorboard/compat/tensorflow_stub/dtypes.py
@@ -323,7 +323,6 @@ def size(self):
 # Define data type range of numpy dtype
 dtype_range = {
     np.bool_: (False, True),
-    np.bool8: (False, True),
     np.uint8: (0, 255),
     np.uint16: (0, 65535),
     np.int8: (-128, 127),