diff --git a/include/boost/python/detail/preprocessor.hpp b/include/boost/python/detail/preprocessor.hpp
index 2c1b2e84ea..a07c08a667 100644
--- a/include/boost/python/detail/preprocessor.hpp
+++ b/include/boost/python/detail/preprocessor.hpp
@@ -26,7 +26,7 @@
 # endif
 
 # ifndef BOOST_PYTHON_MAX_ARITY
-#  define BOOST_PYTHON_MAX_ARITY 15
+#  define BOOST_PYTHON_MAX_ARITY 31
 # endif
 
 # ifndef BOOST_PYTHON_MAX_BASES