diff --git a/paddle/fluid/API.spec b/paddle/fluid/API.spec
index e362d3486487dd0b55e3e40d1c1358f2e5604ac5..211186a65fcf301f4bfcf58f41b56ef7f223a5f8 100644
--- a/paddle/fluid/API.spec
+++ b/paddle/fluid/API.spec
@@ -130,7 +130,7 @@ paddle.fluid.layers.split ArgSpec(args=['input', 'num_or_sections', 'dim', 'name
 paddle.fluid.layers.ctc_greedy_decoder ArgSpec(args=['input', 'blank', 'name'], varargs=None, keywords=None, defaults=(None,))
 paddle.fluid.layers.edit_distance ArgSpec(args=['input', 'label', 'normalized', 'ignored_tokens'], varargs=None, keywords=None, defaults=(True, None))
 paddle.fluid.layers.l2_normalize ArgSpec(args=['x', 'axis', 'epsilon', 'name'], varargs=None, keywords=None, defaults=(1e-12, None))
-paddle.fluid.layers.matmul ArgSpec(args=['x', 'y', 'transpose_x', 'transpose_y', 'name'], varargs=None, keywords=None, defaults=(False, False, None))
+paddle.fluid.layers.matmul ArgSpec(args=['x', 'y', 'transpose_x', 'transpose_y', 'scale', 'bias', 'name'], varargs=None, keywords=None, defaults=(False, False, 1.0, 0.0, None))
 paddle.fluid.layers.topk ArgSpec(args=['input', 'k', 'name'], varargs=None, keywords=None, defaults=(None,))
 paddle.fluid.layers.warpctc ArgSpec(args=['input', 'label', 'blank', 'norm_by_times'], varargs=None, keywords=None, defaults=(0, False))
 paddle.fluid.layers.sequence_reshape ArgSpec(args=['input', 'new_dim'], varargs=None, keywords=None, defaults=None)
diff --git a/paddle/fluid/operators/elementwise_mul_op.cc b/paddle/fluid/operators/elementwise_mul_op.cc
index 5642f7171178ef0046fe0ce7b9689ed715dc02ac..86a8459a79135d1fbcba6886172acc5a2abdb88b 100644
--- a/paddle/fluid/operators/elementwise_mul_op.cc
+++ b/paddle/fluid/operators/elementwise_mul_op.cc
@@ -31,8 +31,8 @@ class ElementwiseMulOpGradDescMaker : public framework::SingleGradOpDescMaker {
     op->SetInput("Y", Input("Y"));
     op->SetInput(framework::GradVarName("Out"), OutputGrad("Out"));
     op->SetAttrMap(Attrs());
-    op->SetOutput(::paddle::framework::GradVarName("X"), InputGrad("X"));
-    op->SetOutput(::paddle::framework::GradVarName("Y"), InputGrad("Y"));
+    op->SetOutput(framework::GradVarName("X"), InputGrad("X"));
+    op->SetOutput(framework::GradVarName("Y"), InputGrad("Y"));
     return op;
   }
 };
@@ -47,7 +47,6 @@ class ElementwiseMulOpMaker : public ElementwiseOpMaker {
 }  // namespace paddle
 
 namespace ops = paddle::operators;
-// REGISTER_ELEMWISE_OP(elementwise_mul, "Mul", "Out = X \\\\odot Y");
 REGISTER_OPERATOR(elementwise_mul, ops::ElementwiseOp,
                   ops::ElementwiseMulOpMaker, ops::ElementwiseOpInferVarType,
                   ops::ElementwiseMulOpGradDescMaker);