diff --git a/include/tao/json/binary.hpp b/include/tao/json/binary.hpp
index bd165b3d..96b1d939 100644
--- a/include/tao/json/binary.hpp
+++ b/include/tao/json/binary.hpp
@@ -91,7 +91,7 @@ namespace tao::json
    inline namespace literals
    {
       template< char... Cs >
-      [[nodiscard]] std::vector< std::byte > operator"" _binary()
+      [[nodiscard]] std::vector< std::byte > operator""_binary()
       {
          return internal::unhex< std::vector< std::byte >, Cs... >();
       }
diff --git a/include/tao/json/from_string.hpp b/include/tao/json/from_string.hpp
index 3262b9c2..2760d190 100644
--- a/include/tao/json/from_string.hpp
+++ b/include/tao/json/from_string.hpp
@@ -29,7 +29,7 @@ namespace tao::json
 
    inline namespace literals
    {
-      [[nodiscard]] inline value operator"" _json( const char* data, const std::size_t size )
+      [[nodiscard]] inline value operator""_json( const char* data, const std::size_t size )
       {
          return json::from_string( data, size, "literal" );
       }
diff --git a/include/tao/json/jaxn/from_string.hpp b/include/tao/json/jaxn/from_string.hpp
index 7d68ba26..53bfc659 100644
--- a/include/tao/json/jaxn/from_string.hpp
+++ b/include/tao/json/jaxn/from_string.hpp
@@ -30,7 +30,7 @@ namespace tao::json::jaxn
 
    inline namespace literals
    {
-      [[nodiscard]] inline value operator"" _jaxn( const char* data, const std::size_t size )
+      [[nodiscard]] inline value operator""_jaxn( const char* data, const std::size_t size )
       {
          return jaxn::from_string( data, size, "literal" );
       }
diff --git a/include/tao/json/pointer.hpp b/include/tao/json/pointer.hpp
index 5e3d451d..7f727c0b 100644
--- a/include/tao/json/pointer.hpp
+++ b/include/tao/json/pointer.hpp
@@ -425,7 +425,7 @@ namespace tao::json
 
    inline namespace literals
    {
-      [[nodiscard]] inline pointer operator"" _json_pointer( const char* data, const std::size_t size )
+      [[nodiscard]] inline pointer operator""_json_pointer( const char* data, const std::size_t size )
       {
          return pointer( { data, size } );
       }