diff --git a/Source/Modules/LangModelRelated/SubLanguageModels/InstantiatedModels/CNSLM.h b/Source/Modules/LangModelRelated/SubLanguageModels/InstantiatedModels/CNSLM.h
index 6154330a..f464255f 100644
--- a/Source/Modules/LangModelRelated/SubLanguageModels/InstantiatedModels/CNSLM.h
+++ b/Source/Modules/LangModelRelated/SubLanguageModels/InstantiatedModels/CNSLM.h
@@ -39,11 +39,11 @@ namespace vChewing
 class CNSLM : public UserPhrasesLM
 {
   public:
-    virtual bool allowConsolidation() override
+    bool allowConsolidation() override
     {
         return false;
     }
-    virtual float overridedValue() override
+    float overridedValue() override
     {
         return -11.0;
     }
diff --git a/Source/Modules/LangModelRelated/SubLanguageModels/InstantiatedModels/SymbolLM.h b/Source/Modules/LangModelRelated/SubLanguageModels/InstantiatedModels/SymbolLM.h
index 78d2a5b7..7c385307 100644
--- a/Source/Modules/LangModelRelated/SubLanguageModels/InstantiatedModels/SymbolLM.h
+++ b/Source/Modules/LangModelRelated/SubLanguageModels/InstantiatedModels/SymbolLM.h
@@ -39,11 +39,11 @@ namespace vChewing
 class SymbolLM : public UserPhrasesLM
 {
   public:
-    virtual bool allowConsolidation() override
+    bool allowConsolidation() override
     {
         return false;
     }
-    virtual float overridedValue() override
+    float overridedValue() override
     {
         return -13.0;
     }
diff --git a/Source/Modules/LangModelRelated/SubLanguageModels/InstantiatedModels/UserSymbolLM.h b/Source/Modules/LangModelRelated/SubLanguageModels/InstantiatedModels/UserSymbolLM.h
index 7d8646cc..7f37c3ac 100644
--- a/Source/Modules/LangModelRelated/SubLanguageModels/InstantiatedModels/UserSymbolLM.h
+++ b/Source/Modules/LangModelRelated/SubLanguageModels/InstantiatedModels/UserSymbolLM.h
@@ -39,11 +39,11 @@ namespace vChewing
 class UserSymbolLM : public UserPhrasesLM
 {
   public:
-    virtual bool allowConsolidation() override
+    bool allowConsolidation() override
     {
         return true;
     }
-    virtual float overridedValue() override
+    float overridedValue() override
     {
         return -12.0;
     }