diff --git a/include/cppjieba/SegmentTagged.hpp b/include/cppjieba/SegmentTagged.hpp
index 685d174..4d99a31 100644
--- a/include/cppjieba/SegmentTagged.hpp
+++ b/include/cppjieba/SegmentTagged.hpp
@@ -5,8 +5,6 @@
 
 namespace cppjieba {
 
-struct DictTrie;
-
 class SegmentTagged : public SegmentBase{
  public:
   SegmentTagged() {
@@ -16,7 +14,7 @@ class SegmentTagged : public SegmentBase{
 
   virtual bool Tag(const string& src, vector<pair<string, string> >& res) const = 0;
 
-  virtual const struct DictTrie* GetDictTrie() const = 0;
+  virtual const DictTrie* GetDictTrie() const = 0;
 
 }; // class SegmentTagged