--- openssh-5.9p1/configure.ac~	2011-09-06 19:31:16.000000000 +0200
+++ openssh-5.9p1/configure.ac	2011-09-06 19:31:55.291791679 +0200
@@ -1076,6 +1076,7 @@
 
 AC_MSG_CHECKING([for possibly buggy zlib])
 AC_RUN_IFELSE([AC_LANG_PROGRAM([[
+#include <stdlib.h>
 #include <stdio.h>
 #include <zlib.h>
 	]],