From ad32e87913f9a7545874203a97601e951802303a Mon Sep 17 00:00:00 2001
From: Lei Wang <bestwanglei@gmail.com>
Date: Wed, 16 May 2018 17:25:56 -0700
Subject: [PATCH] Doc: fix missing parenthesis.

---
 doc/fluid/design/concepts/functions_operators_layers.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/doc/fluid/design/concepts/functions_operators_layers.md b/doc/fluid/design/concepts/functions_operators_layers.md
index 30bc488a18a28d..1f86b99e5197c3 100644
--- a/doc/fluid/design/concepts/functions_operators_layers.md
+++ b/doc/fluid/design/concepts/functions_operators_layers.md
@@ -40,7 +40,7 @@ template <typename T>
 class FCOp : public OperatorBase {
  public:
   void Run(...) {
-    add(mul(Input<T>("X"), Input<T>("W")), Input<T>("b");
+    add(mul(Input<T>("X"), Input<T>("W")), Input<T>("b"));
   }
 };
 REGISTER_OP(FCOp, "fc");