diff --git a/src/third_party/radsort/radsort.h b/src/third_party/radsort/radsort.h
index 9850a6ff..90a971ba 100644
--- a/src/third_party/radsort/radsort.h
+++ b/src/third_party/radsort/radsort.h
@@ -112,8 +112,15 @@ typedef void rs_small_sort_func( void * left, size_t n, size_t element_size, is_
 #define RS_SMALL_FLIP_TO_INSERTION_GT_SIZE sizeof( size_t )
 typedef struct RS_MAX_BUBBLE_BUF { char b[RS_SMALL_FLIP_TO_INSERTION_GT_SIZE]; } RS_MAX_BUBBLE_BUF; 
 
+#if _MSC_VER
+# define radsort_break_ __debugbreak()
+#else
+# define radsort_break_ ___builtin_trap()
+#endif
+
 #define radsort( start, len, is_before_func ) \
 do { \
+if (sizeof((start)[0]) > sizeof(RS_MAX_SIMPLE_BUF)) { radsort_break_; } \
 char __rs_tmp[ sizeof( (start)[0] ) ]; \
 radsortinternal( start, len, sizeof( (start)[0] ), \
 is_before_func, \