diff --git a/src/CalcViewModel/Common/CopyPasteManager.cpp b/src/CalcViewModel/Common/CopyPasteManager.cpp
index ad9ee362..36658cdc 100644
--- a/src/CalcViewModel/Common/CopyPasteManager.cpp
+++ b/src/CalcViewModel/Common/CopyPasteManager.cpp
@@ -477,9 +477,9 @@ size_t CopyPasteManager::OperandLength(wstring operand, ViewMode mode, CategoryG
     }
 }
 
-size_t CopyPasteManager::StandardScientificOperandLength(wstring operand)
+size_t CopyPasteManager::StandardScientificOperandLength(const wstring& operand)
 {   
-    const bool hasDecimal = operand.find('.') != std::wstring::npos;
+    const bool hasDecimal = operand.find('.') != wstring::npos;
 
     if (hasDecimal)
     {
diff --git a/src/CalcViewModel/Common/CopyPasteManager.h b/src/CalcViewModel/Common/CopyPasteManager.h
index bc00e37c..79dd73d9 100644
--- a/src/CalcViewModel/Common/CopyPasteManager.h
+++ b/src/CalcViewModel/Common/CopyPasteManager.h
@@ -56,7 +56,7 @@ namespace CalculatorApp
         static std::wstring SanitizeOperand(const std::wstring& operand);
         static bool TryOperandToULL(const std::wstring& operand, int numberBase, unsigned long long int& result);
         static size_t OperandLength(std::wstring operand, CalculatorApp::Common::ViewMode mode, CalculatorApp::Common::CategoryGroupType modeType, int programmerNumberBase = -1);
-        static size_t StandardScientificOperandLength(std::wstring operand);
+        static size_t StandardScientificOperandLength(const std::wstring& operand);
         static size_t ProgrammerOperandLength(const std::wstring& operand, int numberBase);
         static std::wstring RemoveUnwantedCharsFromWstring(const std::wstring& input);