diff --git a/ndonnx/_core/_numericimpl.py b/ndonnx/_core/_numericimpl.py
index e22205c..f67c8ec 100644
--- a/ndonnx/_core/_numericimpl.py
+++ b/ndonnx/_core/_numericimpl.py
@@ -102,12 +102,16 @@ def bitwise_right_shift(self, x, y):
             return binary_op(
                 x, y, lambda a, b: opx.bit_shift(a, b, direction="RIGHT"), dtypes.uint64
             )
-        MAX_POW = 63
-        return ndx.where(
-            y >= MAX_POW,
-            ndx.where(x >= 0, 0, -1),
-            ndx.floor_divide(x, ndx.pow(ndx.asarray(2, ndx.int64), y)),
-        ).astype(x.dtype)
+        elif isinstance(x.dtype, (dtypes.Integral, dtypes.NullableIntegral)):
+            MAX_POW = 63
+            pow2 = ndx.pow(ndx.asarray(2, ndx.int64), ndx.where(y > MAX_POW, 0, y))
+            return ndx.where(
+                y >= MAX_POW,
+                ndx.where(x >= 0, 0, -1),
+                ndx.floor_divide(x, pow2),
+            ).astype(x.dtype)
+        else:
+            return NotImplemented
 
     @validate_core
     def bitwise_xor(self, x, y):
diff --git a/tests/test_core.py b/tests/test_core.py
index 9c1e81e..81a9547 100644
--- a/tests/test_core.py
+++ b/tests/test_core.py
@@ -1043,3 +1043,21 @@ def test_argmaxmin_unsupported_kernels(func, x):
 
     with pytest.raises(TypeError):
         getattr(ndx, func.__name__)(ndx.asarray(x))
+
+
+@pytest.mark.parametrize(
+    "x, index",
+    [
+        (
+            ndx.asarray([1, 2, 3, 4, 5]),
+            ndx.asarray([[True, True, False, False, True]], dtype=ndx.bool),
+        ),
+        (
+            ndx.asarray([1, 2, 3, 4, 5]),
+            ndx.asarray([True, False, False, True], dtype=ndx.bool),
+        ),
+    ],
+)
+def test_getitem_bool_raises(x, index):
+    with pytest.raises(IndexError):
+        x[index]