diff --git a/include/sol/stack_core.hpp b/include/sol/stack_core.hpp
index 90e74061..1baaf143 100644
--- a/include/sol/stack_core.hpp
+++ b/include/sol/stack_core.hpp
@@ -66,7 +66,7 @@ namespace sol {
 
 		inline void* alloc_newuserdata(lua_State* L, std::size_t bytesize) {
 #if SOL_LUA_VERSION >= 504
-			return lua_newuserdatauv(L, bytesize, 0);
+			return lua_newuserdatauv(L, bytesize, 1);
 #else
 			return lua_newuserdata(L, bytesize);
 #endif
diff --git a/single/include/sol/config.hpp b/single/include/sol/config.hpp
index cc41ad57..66ca399d 100644
--- a/single/include/sol/config.hpp
+++ b/single/include/sol/config.hpp
@@ -20,8 +20,8 @@
 // CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 // This file was generated with a script.
-// Generated 2020-10-24 08:52:46.516426 UTC
-// This header was generated with sol v3.2.3 (revision 651b90ba)
+// Generated 2020-11-02 10:53:05.003420 UTC
+// This header was generated with sol v3.2.3 (revision 63e396b9)
 // https://github.com/ThePhD/sol2
 
 #ifndef SOL_SINGLE_CONFIG_HPP
diff --git a/single/include/sol/forward.hpp b/single/include/sol/forward.hpp
index ecea0770..c40dc3e7 100644
--- a/single/include/sol/forward.hpp
+++ b/single/include/sol/forward.hpp
@@ -20,8 +20,8 @@
 // CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 // This file was generated with a script.
-// Generated 2020-10-24 08:52:46.504426 UTC
-// This header was generated with sol v3.2.3 (revision 651b90ba)
+// Generated 2020-11-02 10:53:04.990407 UTC
+// This header was generated with sol v3.2.3 (revision 63e396b9)
 // https://github.com/ThePhD/sol2
 
 #ifndef SOL_SINGLE_INCLUDE_FORWARD_HPP
diff --git a/single/include/sol/sol.hpp b/single/include/sol/sol.hpp
index c17aaf51..2751eadf 100644
--- a/single/include/sol/sol.hpp
+++ b/single/include/sol/sol.hpp
@@ -20,8 +20,8 @@
 // CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 // This file was generated with a script.
-// Generated 2020-10-24 08:52:45.802426 UTC
-// This header was generated with sol v3.2.3 (revision 651b90ba)
+// Generated 2020-11-02 10:53:04.356408 UTC
+// This header was generated with sol v3.2.3 (revision 63e396b9)
 // https://github.com/ThePhD/sol2
 
 #ifndef SOL_SINGLE_INCLUDE_HPP
@@ -9839,7 +9839,7 @@ namespace sol {
 
 		inline void* alloc_newuserdata(lua_State* L, std::size_t bytesize) {
 #if SOL_LUA_VERSION >= 504
-			return lua_newuserdatauv(L, bytesize, 0);
+			return lua_newuserdatauv(L, bytesize, 1);
 #else
 			return lua_newuserdata(L, bytesize);
 #endif