diff --git a/paddle/gserver/layers/HierarchicalSigmoidLayer.h b/paddle/gserver/layers/HierarchicalSigmoidLayer.h
index 3f6875fb9f007c0938bfcd7cad99c73b4ba1511b..9afd40b1674680da962d6e51caa56b46279b70de 100644
--- a/paddle/gserver/layers/HierarchicalSigmoidLayer.h
+++ b/paddle/gserver/layers/HierarchicalSigmoidLayer.h
@@ -36,7 +36,7 @@ namespace paddle {
  * |   |- 5
  * |
  * |-*- 0
- * |- 1
+ *   |- 1
  * @endcode
  *
  * where * indicates an internal node, and each leaf node represents a class.