diff -urN musl.orig//include/dirent.h musl/include/dirent.h
--- musl.orig//include/dirent.h	2012-08-24 14:16:18.000000000 +0200
+++ musl/include/dirent.h	2012-08-24 17:30:57.701972837 +0200
@@ -55,6 +55,8 @@
 #endif
 
 #ifdef _BSD_SOURCE
+#define __NEED_size_t
+#include <bits/alltypes.h>
 int getdents(int, struct dirent *, size_t);
 #endif