diff --git a/src/libs/vpatterndb/calculator.cpp b/src/libs/vpatterndb/calculator.cpp
index 7f8ac74f8..4dcf10795 100644
--- a/src/libs/vpatterndb/calculator.cpp
+++ b/src/libs/vpatterndb/calculator.cpp
@@ -59,11 +59,6 @@ Calculator::Calculator()
     SetSepForEval();
 }
 
-//---------------------------------------------------------------------------------------------------------------------
-Calculator::~Calculator()
-{
-}
-
 //---------------------------------------------------------------------------------------------------------------------
 /**
  * @brief eval calculate formula.
diff --git a/src/libs/vpatterndb/calculator.h b/src/libs/vpatterndb/calculator.h
index 5bf1ea31b..10eddeca8 100644
--- a/src/libs/vpatterndb/calculator.h
+++ b/src/libs/vpatterndb/calculator.h
@@ -36,9 +36,6 @@
 #include <QtGlobal>
 
 #include "../qmuparser/qmuformulabase.h"
-#include "../vmisc/def.h"
-
-class VContainer;
 
 /**
  * @brief The Calculator class for calculation formula.
@@ -62,12 +59,13 @@ class Calculator:public qmu::QmuFormulaBase
 {
 public:
     Calculator();
-    virtual ~Calculator() Q_DECL_OVERRIDE;
-    qreal         EvalFormula(const QHash<QString, qreal *> &vars, const QString &formula);
+    virtual ~Calculator() Q_DECL_EQ_DEFAULT;
+
+    qreal EvalFormula(const QHash<QString, qreal *> &vars, const QString &formula);
 private:
     Q_DISABLE_COPY(Calculator)
-    void          InitVariables(const QHash<QString, qreal *> &vars, const QMap<int, QString> &tokens,
-                                const QString &formula);
+
+    void InitVariables(const QHash<QString, qreal *> &vars, const QMap<int, QString> &tokens, const QString &formula);
 };
 
 #endif // CALCULATOR_H