diff --git a/tensorflow/docs_src/extend/adding_an_op.md b/tensorflow/docs_src/extend/adding_an_op.md
index 9b55f95cb7c..85f3aa2ce4d 100644
--- a/tensorflow/docs_src/extend/adding_an_op.md
+++ b/tensorflow/docs_src/extend/adding_an_op.md
@@ -530,6 +530,7 @@ REGISTER_OP("AttrDefaultExampleForAllTypes")
 Note in particular that the values of type `type` use @{$dims_types#data-types$the `DT_*` names for the types}.
 
 #### Polymorphism {#polymorphism}
+
 ##### Type Polymorphism
 
 For ops that can take different types as input or produce different output
@@ -871,11 +872,11 @@ expressions:
   ```c++
   REGISTER_OP("PolymorphicSingleInput")
       .Attr("T: type")
-      .Input("in: T);
+      .Input("in: T");
 
   REGISTER_OP("RestrictedPolymorphicSingleInput")
       .Attr("T: {int32, int64}")
-      .Input("in: T);
+      .Input("in: T");
   ```
 
   Referencing an attr of type `list(type)` allows you to accept a sequence of