diff --git a/python/paddle/tensor/logic.py b/python/paddle/tensor/logic.py
index 865b2a62d4ca21..6f7ece749afff6 100755
--- a/python/paddle/tensor/logic.py
+++ b/python/paddle/tensor/logic.py
@@ -907,6 +907,7 @@ def less_than(x, y, name=None):
                 "float16",
                 "float32",
                 "float64",
+                "int16",
                 "int32",
                 "int64",
                 "uint16",
@@ -921,6 +922,7 @@ def less_than(x, y, name=None):
                 "float16",
                 "float32",
                 "float64",
+                "int16",
                 "int32",
                 "int64",
                 "uint16",
diff --git a/test/legacy_test/test_compare_op.py b/test/legacy_test/test_compare_op.py
index 91dce088ef88ef..7c8f3829738da9 100755
--- a/test/legacy_test/test_compare_op.py
+++ b/test/legacy_test/test_compare_op.py
@@ -615,6 +615,21 @@ def test_place_2(self):
         self.assertEqual((result.numpy() == np.array([False])).all(), True)
 
 
+class TestLessThanInt8(unittest.TestCase):
+    def test_less_than_int8(self):
+        # Create a tensor of type int8
+        x = paddle.to_tensor([1, 2, 3], dtype='int16')
+        y = paddle.to_tensor([1, 3, 2], dtype='int16')
+
+        result = paddle.less_than(x, y)
+
+        # desired output
+        expected = np.array([False, True, False])
+
+        # Verify output
+        self.assertTrue((result.numpy() == expected).all())
+
+
 if __name__ == '__main__':
     paddle.enable_static()
     unittest.main()
diff --git a/third_party/mkldnn b/third_party/mkldnn
index 01204edbda1c2a..403667673f61a5 160000
--- a/third_party/mkldnn
+++ b/third_party/mkldnn
@@ -1 +1 @@
-Subproject commit 01204edbda1c2a4ff0cccd40476ed6bd2fb62d56
+Subproject commit 403667673f61a56289622fd5bc587b1856296fbc