diff --git a/python/paddle/__init__.py b/python/paddle/__init__.py
index 09eb9c9c30d29..d34f76b1c7633 100644
--- a/python/paddle/__init__.py
+++ b/python/paddle/__init__.py
@@ -805,7 +805,8 @@
     'standard_gamma',
     'sinh',
     'sinh_',
-    'round',
+    'sinc',
+    'sinc_' 'round',
     'DataParallel',
     'argmin',
     'prod',
diff --git a/test/legacy_test/test_sinc.py b/test/legacy_test/test_sinc.py
index a3ed1e30b782e..0750facf55cff 100644
--- a/test/legacy_test/test_sinc.py
+++ b/test/legacy_test/test_sinc.py
@@ -144,6 +144,22 @@ def test_input_dype_error(self):
                 res = paddle.sinc(x)
                 static_result = exe.run(feed={'x': x_data}, fetch_list=[res])[0]
 
+
+class TestSincInplaceAPI(unittest.TestCase):
+    def setUp(self):
+        self.cpu_support_dtypes = [
+            'float32',
+            'float64',
+        ]
+        self.cuda_support_dtypes = [
+            'float32',
+            'float64',
+        ]
+        self.place = [paddle.CPUPlace()]
+        if core.is_compiled_with_cuda():
+            self.place.append(paddle.CUDAPlace(0))
+        self.shapes = [[6], [16, 64]]
+
     def test_inplace(self):
         def run_dygraph(place):
             paddle.disable_static(place)
@@ -165,6 +181,11 @@ def run_dygraph(place):
         for place in self.place:
             run_dygraph(place)
 
+    def test_inplace_input_type_error(self):
+        with self.assertRaises(TypeError):
+            x = np.random.rand(6).astype('float32')
+            paddle.sinc_(x)
+
 
 @unittest.skipIf(
     not core.is_compiled_with_cuda()