diff --git a/src/CalcManager/CalculatorManager.h b/src/CalcManager/CalculatorManager.h
index 780caa5..9b38242 100644
--- a/src/CalcManager/CalculatorManager.h
+++ b/src/CalcManager/CalculatorManager.h
@@ -119,7 +119,7 @@ namespace CalculationManager
 
         bool IsEngineRecording();
         bool IsInputEmpty();
-        std::vector<unsigned char> GetSavedCommands()
+        const std::vector<unsigned char>& GetSavedCommands() const
         {
             return m_savedCommands;
         }