# Makes Boost use `sprintf` instead of `snprintf` on platforms with no `snprintf` support.

--- a/include/boost/assert/source_location.hpp
+++ b/include/boost/assert/source_location.hpp
@@ -76,7 +76,7 @@ public:
 # pragma warning( disable: 4996 )
 #endif
 
-#if ( defined(_MSC_VER) && _MSC_VER < 1900 ) || ( defined(__MINGW32__) && !defined(__MINGW64_VERSION_MAJOR) )
+#if ( defined(_MSC_VER) && _MSC_VER < 1900 ) || ( defined(__MINGW32__) && !defined(__MINGW64_VERSION_MAJOR) ) || defined(MKXPZ_NO_SNPRINTF)
 # define BOOST_ASSERT_SNPRINTF(buffer, format, arg) std::sprintf(buffer, format, arg)
 #else
 # define BOOST_ASSERT_SNPRINTF(buffer, format, arg) std::snprintf(buffer, sizeof(buffer)/sizeof(buffer[0]), format, arg)