diff --git a/src/fintamath/numbers/RealFunctions.cpp b/src/fintamath/numbers/RealFunctions.cpp
index 588ee74a1..95743fc57 100644
--- a/src/fintamath/numbers/RealFunctions.cpp
+++ b/src/fintamath/numbers/RealFunctions.cpp
@@ -17,9 +17,9 @@ namespace fintamath {
 
 using namespace detail;
 
-constexpr std::string_view backendIsInfException = "Undefined backend inf";
-constexpr std::string_view backendIsNegInfException = "Undefined backend -inf";
-constexpr std::string_view backendIsNanException = "Undefined backend nan";
+static const std::string backendIsInfException = "Undefined backend inf";
+static const std::string backendIsNegInfException = "Undefined backend -inf";
+static const std::string backendIsNanException = "Undefined backend nan";
 
 namespace {