diff --git a/include/sol/version.hpp b/include/sol/version.hpp
index 166821d7..252d08f7 100644
--- a/include/sol/version.hpp
+++ b/include/sol/version.hpp
@@ -678,8 +678,9 @@
 	#endif
 #endif
 
-#if SOL_IS_ON (SOL_USE_BOOST_I)
+#if SOL_IS_ON(SOL_USE_BOOST_I_)
 	#include <boost/version.hpp>
+
 	#if BOOST_VERSION >= 107500 // Since Boost 1.75.0 boost::none is constexpr
 		#define SOL_BOOST_NONE_CONSTEXPR_I_ constexpr
 	#else
diff --git a/single/include/sol/config.hpp b/single/include/sol/config.hpp
index eaa1d6e1..4ce46b4d 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 2021-02-14 05:32:40.818169 UTC
-// This header was generated with sol v3.2.3 (revision 4e2ee29b)
+// Generated 2021-02-14 05:45:03.730363 UTC
+// This header was generated with sol v3.2.3 (revision 37d891fa)
 // 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 6ee22bcc..1f8a2166 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 2021-02-14 05:32:40.813170 UTC
-// This header was generated with sol v3.2.3 (revision 4e2ee29b)
+// Generated 2021-02-14 05:45:03.725363 UTC
+// This header was generated with sol v3.2.3 (revision 37d891fa)
 // https://github.com/ThePhD/sol2
 
 #ifndef SOL_SINGLE_INCLUDE_FORWARD_HPP
@@ -684,8 +684,9 @@
 	#endif
 #endif
 
-#if SOL_IS_ON (SOL_USE_BOOST_I)
+#if SOL_IS_ON(SOL_USE_BOOST_I_)
 	#include <boost/version.hpp>
+
 	#if BOOST_VERSION >= 107500 // Since Boost 1.75.0 boost::none is constexpr
 		#define SOL_BOOST_NONE_CONSTEXPR_I_ constexpr
 	#else
diff --git a/single/include/sol/sol.hpp b/single/include/sol/sol.hpp
index 164a5a21..3e7feaea 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 2021-02-14 05:32:40.369159 UTC
-// This header was generated with sol v3.2.3 (revision 4e2ee29b)
+// Generated 2021-02-14 05:45:03.271116 UTC
+// This header was generated with sol v3.2.3 (revision 37d891fa)
 // https://github.com/ThePhD/sol2
 
 #ifndef SOL_SINGLE_INCLUDE_HPP
@@ -684,8 +684,9 @@
 	#endif
 #endif
 
-#if SOL_IS_ON (SOL_USE_BOOST_I)
+#if SOL_IS_ON(SOL_USE_BOOST_I_)
 	#include <boost/version.hpp>
+
 	#if BOOST_VERSION >= 107500 // Since Boost 1.75.0 boost::none is constexpr
 		#define SOL_BOOST_NONE_CONSTEXPR_I_ constexpr
 	#else