diff --git a/single_include/toml.hpp b/single_include/toml.hpp
index d9a40f8..6310050 100644
--- a/single_include/toml.hpp
+++ b/single_include/toml.hpp
@@ -16691,7 +16691,7 @@ inline namespace literals
 inline namespace toml_literals
 {
 
-::toml::value operator"" _toml(const char* str, std::size_t len);
+::toml::value operator""_toml(const char* str, std::size_t len);
 
 #if defined(TOML11_HAS_CHAR8_T)
 // value of u8"" literal has been changed from char to char8_t and char8_t is
@@ -16819,7 +16819,7 @@ inline namespace toml_literals
 {
 
 TOML11_INLINE ::toml::value
-operator"" _toml(const char* str, std::size_t len)
+operator""_toml(const char* str, std::size_t len)
 {
     if(len == 0)
     {