diff --git a/runners/calculator/calculatorrunner.cpp b/runners/calculator/calculatorrunner.cpp
index 52ca1a516..d8c252fef 100644
--- a/runners/calculator/calculatorrunner.cpp
+++ b/runners/calculator/calculatorrunner.cpp
@@ -66,6 +66,7 @@ CalculatorRunner::~CalculatorRunner()
 #endif
 }
 
+#ifndef ENABLE_QALCULATE
 void CalculatorRunner::powSubstitutions(QString &cmd)
 {
     if (cmd.contains(QLatin1String("e+"), Qt::CaseInsensitive)) {
@@ -178,6 +179,7 @@ void CalculatorRunner::hexSubstitutions(QString &cmd)
         }
     }
 }
+#endif
 
 void CalculatorRunner::userFriendlySubstitutions(QString &cmd)
 {
diff --git a/runners/calculator/calculatorrunner.h b/runners/calculator/calculatorrunner.h
index 596c6407e..b6c4ab019 100644
--- a/runners/calculator/calculatorrunner.h
+++ b/runners/calculator/calculatorrunner.h
@@ -49,8 +49,10 @@ private:
     QString calculate(const QString &term, bool *isApproximate);
     void userFriendlyMultiplication(QString &cmd);
     void userFriendlySubstitutions(QString &cmd);
+#ifndef ENABLE_QALCULATE
     void powSubstitutions(QString &cmd);
     void hexSubstitutions(QString &cmd);
+#endif
 
 #ifdef ENABLE_QALCULATE
     QalculateEngine *m_engine;