diff --git a/paddle/gserver/layers/CostLayer.h b/paddle/gserver/layers/CostLayer.h
index 856d1012adc6c5d05c06373f3de4a2d05648fdd2..14c0b33ec1a628521ae2d694dda8da553c29fd38 100644
--- a/paddle/gserver/layers/CostLayer.h
+++ b/paddle/gserver/layers/CostLayer.h
@@ -91,8 +91,8 @@ public:
  *
  * [1] Jacob Devlin, Rabih Zbib, Zhongqiang Huang, Thomas Lamar,
  *     Richard Schwartz, and John Makhoul. Fast and robust neural
- *     network joint models for statistical machine translation.  *     In
- * Proceedings of the ACL 2014 Conference.
+ *     network joint models for statistical machine translation.
+ *     In Proceedings of the ACL 2014 Conference.
  */
 class MultiClassCrossEntropyWithSelfNorm : public CostLayer {
 public: