--- sysdeps/unix/sysv/linux/mkdirat.c.orig	2011-01-28 15:50:00.000000000 +0100
+++ sysdeps/unix/sysv/linux/mkdirat.c	2011-01-28 15:51:42.000000000 +0100
@@ -43,7 +43,7 @@
     {
       res = INLINE_SYSCALL (mkdirat, 3, fd, file, mode);
 # ifndef __ASSUME_ATFCTS
-      if (res == -1 && res == ENOSYS)
+      if (res == -1 && errno == ENOSYS)
 	__have_atfcts = -1;
       else
 # endif