diff --git a/src/CalcViewModel/HistoryViewModel.h b/src/CalcViewModel/HistoryViewModel.h
index d7c7874e..b46de4b5 100644
--- a/src/CalcViewModel/HistoryViewModel.h
+++ b/src/CalcViewModel/HistoryViewModel.h
@@ -52,7 +52,6 @@ namespace CalculatorApp
             internal : HistoryViewModel(_In_ CalculationManager::CalculatorManager* calculatorManager);
             void SetCalculatorDisplay(CalculatorDisplay& calculatorDisplay);
             void ReloadHistory(_In_ CalculatorApp::Common::ViewMode currentMode);
-            unsigned long long GetMaxItemSize();
 
             void DeleteItem(_In_ CalculatorApp::ViewModel::HistoryItemViewModel ^ e);