diff --git a/lib/torch/tensor.rb b/lib/torch/tensor.rb
index 1473ee8..cdec05e 100644
--- a/lib/torch/tensor.rb
+++ b/lib/torch/tensor.rb
@@ -24,6 +24,7 @@ class Tensor
     alias_method :^, :logical_xor
     alias_method :<<, :__lshift__
     alias_method :>>, :__rshift__
+    alias_method :~, :bitwise_not
 
     def self.new(*args)
       FloatTensor.new(*args)
diff --git a/test/tensor_methods_test.rb b/test/tensor_methods_test.rb
index 8476e4b..8639323 100644
--- a/test/tensor_methods_test.rb
+++ b/test/tensor_methods_test.rb
@@ -132,4 +132,9 @@ def test_dup
   def test_cumsum_dtype
     assert_equal :int64, Torch.tensor([1, 2, 3]).cumsum(dim: 0).dtype
   end
+
+  def test_bitwise_not
+    x = Torch.tensor([1, 2, 3])
+    assert_tensor [-2, -3, -4], ~x
+  end
 end