diff --git a/src/json.hpp b/src/json.hpp
index a6775e53e..3cf3a1394 100644
--- a/src/json.hpp
+++ b/src/json.hpp
@@ -5801,7 +5801,7 @@ class basic_json
     ///////////////////////////
 
     /// return the type as string
-    string_t type_name() const noexcept
+    std::string type_name() const
     {
         switch (m_type)
         {
diff --git a/src/json.hpp.re2c b/src/json.hpp.re2c
index 1967f6a81..15ab97e64 100644
--- a/src/json.hpp.re2c
+++ b/src/json.hpp.re2c
@@ -5801,7 +5801,7 @@ class basic_json
     ///////////////////////////
 
     /// return the type as string
-    string_t type_name() const noexcept
+    std::string type_name() const
     {
         switch (m_type)
         {