diff --git a/include/SFML/System/Angle.hpp b/include/SFML/System/Angle.hpp
index dff4a1f2d..92b759eb7 100644
--- a/include/SFML/System/Angle.hpp
+++ b/include/SFML/System/Angle.hpp
@@ -435,7 +435,7 @@ namespace Literals
 /// \return \a Angle
 ///
 ////////////////////////////////////////////////////////////
-[[nodiscard]] constexpr Angle operator"" _deg(long double angle);
+[[nodiscard]] constexpr Angle operator""_deg(long double angle);
 
 ////////////////////////////////////////////////////////////
 /// \relates sf::Angle
@@ -446,7 +446,7 @@ namespace Literals
 /// \return \a Angle
 ///
 ////////////////////////////////////////////////////////////
-[[nodiscard]] constexpr Angle operator"" _deg(unsigned long long int angle);
+[[nodiscard]] constexpr Angle operator""_deg(unsigned long long int angle);
 
 ////////////////////////////////////////////////////////////
 /// \relates sf::Angle
@@ -457,7 +457,7 @@ namespace Literals
 /// \return \a Angle
 ///
 ////////////////////////////////////////////////////////////
-[[nodiscard]] constexpr Angle operator"" _rad(long double angle);
+[[nodiscard]] constexpr Angle operator""_rad(long double angle);
 
 ////////////////////////////////////////////////////////////
 /// \relates sf::Angle
@@ -468,7 +468,7 @@ namespace Literals
 /// \return \a Angle
 ///
 ////////////////////////////////////////////////////////////
-[[nodiscard]] constexpr Angle operator"" _rad(unsigned long long int angle);
+[[nodiscard]] constexpr Angle operator""_rad(unsigned long long int angle);
 
 } // namespace Literals
 
diff --git a/include/SFML/System/Angle.inl b/include/SFML/System/Angle.inl
index 4e91e0245..4d4ea3974 100644
--- a/include/SFML/System/Angle.inl
+++ b/include/SFML/System/Angle.inl
@@ -226,28 +226,28 @@ namespace Literals
 {
 
 ////////////////////////////////////////////////////////////
-constexpr Angle operator"" _deg(long double angle)
+constexpr Angle operator""_deg(long double angle)
 {
     return degrees(static_cast<float>(angle));
 }
 
 
 ////////////////////////////////////////////////////////////
-constexpr Angle operator"" _deg(unsigned long long angle)
+constexpr Angle operator""_deg(unsigned long long angle)
 {
     return degrees(static_cast<float>(angle));
 }
 
 
 ////////////////////////////////////////////////////////////
-constexpr Angle operator"" _rad(long double angle)
+constexpr Angle operator""_rad(long double angle)
 {
     return radians(static_cast<float>(angle));
 }
 
 
 ////////////////////////////////////////////////////////////
-constexpr Angle operator"" _rad(unsigned long long angle)
+constexpr Angle operator""_rad(unsigned long long angle)
 {
     return radians(static_cast<float>(angle));
 }