diff --git a/src/CalcViewModel/Common/CopyPasteManager.cpp b/src/CalcViewModel/Common/CopyPasteManager.cpp
index d123d780..9b024691 100644
--- a/src/CalcViewModel/Common/CopyPasteManager.cpp
+++ b/src/CalcViewModel/Common/CopyPasteManager.cpp
@@ -26,18 +26,18 @@ constexpr wstring_view c_validCharacterSet{ L"0123456789()+-*/.abcdefABCDEF" };
 // as both wstring_view and wchar[] can not be concatenated
 // [\s\x85] means white-space characters
 static const wstring c_wspc = L"[\\s\\x85]*";
-static const auto c_wspcLParens = c_wspc + L"[(]*" + c_wspc;
-static const auto c_wspcLParenSigned = c_wspc + L"([-+]?[(])*" + c_wspc;
-static const auto c_wspcRParens = c_wspc + L"[)]*" + c_wspc;
-static const auto c_signedDecFloat = L"[-+]?\\d*(\\d|[.])\\d*";
+static const wstring c_wspcLParens = c_wspc + L"[(]*" + c_wspc;
+static const wstring c_wspcLParenSigned = c_wspc + L"([-+]?[(])*" + c_wspc;
+static const wstring c_wspcRParens = c_wspc + L"[)]*" + c_wspc;
+static const wstring c_signedDecFloat = L"[-+]?\\d*(\\d|[.])\\d*";
 
 // Programmer Mode Integer patterns
 // Support digit separators ` (WinDbg/MASM), ' (C++), and _ (C# and other languages)
-static constexpr auto c_hexProgrammerChars = L"([a-f]|[A-F]|\\d)+((_|'|`)([a-f]|[A-F]|\\d)+)*";
-static constexpr auto c_decProgrammerChars = L"\\d+((_|'|`)\\d+)*";
-static constexpr auto c_octProgrammerChars = L"[0-7]+((_|'|`)[0-7]+)*";
-static constexpr auto c_binProgrammerChars = L"[0-1]+((_|'|`)[0-1]+)*";
-static constexpr auto c_uIntSuffixes = L"[uU]?[lL]{0,2}";
+static const wstring c_hexProgrammerChars = L"([a-f]|[A-F]|\\d)+((_|'|`)([a-f]|[A-F]|\\d)+)*";
+static const wstring c_decProgrammerChars = L"\\d+((_|'|`)\\d+)*";
+static const wstring c_octProgrammerChars = L"[0-7]+((_|'|`)[0-7]+)*";
+static const wstring c_binProgrammerChars = L"[0-1]+((_|'|`)[0-1]+)*";
+static const wstring c_uIntSuffixes = L"[uU]?[lL]{0,2}";
 
 // RegEx Patterns used by various modes
 static const array<wregex, 1> standardModePatterns =