Index: libc/malloc/malloc.c
===================================================================
--- libc/malloc/malloc.c	(revision e209fc9638825e0d9388de4f48da510f066470b6)
+++ libc/malloc/malloc.c	(revision 237867d9836bd884a8c8c52b026ca9bf491f5cb7)
@@ -466,5 +466,11 @@
 #define ONLY_MSPACES 0
 #define MSPACES 0
+
+#ifdef MALLOC_ALIGNMENT_16
+#define MALLOC_ALIGNMENT ((size_t)16U)
+#else
 #define MALLOC_ALIGNMENT ((size_t)8U)
+#endif
+
 #define FOOTERS 0
 #define ABORT  abort()