diff --git a/include/toml++/impl/parser.hpp b/include/toml++/impl/parser.hpp
index c794c5e4..7651820b 100644
--- a/include/toml++/impl/parser.hpp
+++ b/include/toml++/impl/parser.hpp
@@ -345,7 +345,7 @@ TOML_NAMESPACE_START
 		///				A toml::parse_result.
 		TOML_NODISCARD
 		TOML_ALWAYS_INLINE
-		parse_result operator"" _toml(const char* str, size_t len)
+		parse_result operator""_toml(const char* str, size_t len)
 		{
 			return parse(std::string_view{ str, len });
 		}
@@ -374,7 +374,7 @@ TOML_NAMESPACE_START
 		///				A toml::parse_result.
 		TOML_NODISCARD
 		TOML_ALWAYS_INLINE
-		parse_result operator"" _toml(const char8_t* str, size_t len)
+		parse_result operator""_toml(const char8_t* str, size_t len)
 		{
 			return parse(std::u8string_view{ str, len });
 		}
diff --git a/include/toml++/impl/path.hpp b/include/toml++/impl/path.hpp
index 5bd0ef37..831c0bc9 100644
--- a/include/toml++/impl/path.hpp
+++ b/include/toml++/impl/path.hpp
@@ -790,7 +790,7 @@ TOML_NAMESPACE_START
 		/// \returns	A #toml::path generated from the string literal.
 		TOML_NODISCARD
 		TOML_ALWAYS_INLINE
-		path operator"" _tpath(const char* str, size_t len)
+		path operator""_tpath(const char* str, size_t len)
 		{
 			return path(std::string_view{ str, len });
 		}
diff --git a/tests/tests.hpp b/tests/tests.hpp
index de1b4298..00baee88 100644
--- a/tests/tests.hpp
+++ b/tests/tests.hpp
@@ -45,7 +45,7 @@ TOML_ENABLE_WARNINGS;
 TOML_NODISCARD
 TOML_ATTR(const)
 TOML_ALWAYS_INLINE
-constexpr size_t operator"" _sz(unsigned long long n) noexcept
+constexpr size_t operator""_sz(unsigned long long n) noexcept
 {
 	return static_cast<size_t>(n);
 }
diff --git a/toml.hpp b/toml.hpp
index f73994e4..6de5332e 100644
--- a/toml.hpp
+++ b/toml.hpp
@@ -3658,7 +3658,7 @@ TOML_NAMESPACE_START
 	{
 		TOML_NODISCARD
 		TOML_ALWAYS_INLINE
-		path operator"" _tpath(const char* str, size_t len)
+		path operator""_tpath(const char* str, size_t len)
 		{
 			return path(std::string_view{ str, len });
 		}
@@ -9712,7 +9712,7 @@ TOML_NAMESPACE_START
 
 		TOML_NODISCARD
 		TOML_ALWAYS_INLINE
-		parse_result operator"" _toml(const char* str, size_t len)
+		parse_result operator""_toml(const char* str, size_t len)
 		{
 			return parse(std::string_view{ str, len });
 		}
@@ -9721,7 +9721,7 @@ TOML_NAMESPACE_START
 
 		TOML_NODISCARD
 		TOML_ALWAYS_INLINE
-		parse_result operator"" _toml(const char8_t* str, size_t len)
+		parse_result operator""_toml(const char8_t* str, size_t len)
 		{
 			return parse(std::u8string_view{ str, len });
 		}