diff -ur libtorrent-0.6.3/configure.ac libtorrent-0.6.3-fbsd/configure.ac
--- libtorrent-0.6.3/configure.ac	2005-05-30 21:20:48.000000000 +0200
+++ libtorrent-0.6.3-fbsd/configure.ac	2005-05-30 21:34:13.650583392 +0200
@@ -54,6 +54,8 @@
 
 AC_DEFINE(HAVE_CONFIG_H, 1, true if config.h was included)
 
+AC_CHECK_HEADERS([malloc.h])
+
 AC_OUTPUT([
 	libtorrent.pc
 	Makefile
Only in libtorrent-0.6.3-fbsd/: configure.ac.orig
diff -ur libtorrent-0.6.3/src/utils/sha_fast.cc libtorrent-0.6.3-fbsd/src/utils/sha_fast.cc
--- libtorrent-0.6.3/src/utils/sha_fast.cc	2005-05-30 21:19:53.000000000 +0200
+++ libtorrent-0.6.3-fbsd/src/utils/sha_fast.cc	2005-05-30 21:34:16.219192904 +0200
@@ -35,7 +35,10 @@
 
 #include "config.h"
 
+#ifdef HAVE_MALLOC_H
 #include <malloc.h>
+#endif
+
 #include <memory.h>
 #include "sha_fast.h"