diff -Nurp VirtualBox-4.1.8_OSE-p2/src/VBox/Runtime/r3/linux/semmutex-linux.cpp VirtualBox-4.1.8_OSE-p3/src/VBox/Runtime/r3/linux/semmutex-linux.cpp
--- VirtualBox-4.1.8_OSE-p2/src/VBox/Runtime/r3/linux/semmutex-linux.cpp	2011-12-19 15:01:33.000000000 +0200
+++ VirtualBox-4.1.8_OSE-p3/src/VBox/Runtime/r3/linux/semmutex-linux.cpp	2011-12-24 15:25:16.791196405 +0200
@@ -88,7 +88,7 @@ struct RTSEMMUTEXINTERNAL
 static long sys_futex(int32_t volatile *uaddr, int op, int val, struct timespec *utime, int32_t *uaddr2, int val3)
 {
     errno = 0;
-    long rc = syscall(__NR_futex, uaddr, op, val, utime, uaddr2, val3);
+    long rc = syscall(SYS_futex, uaddr, op, val, utime, uaddr2, val3);
     if (rc < 0)
     {
         Assert(rc == -1);