diff --git a/src/pkg/syscall/syscall_linux_arm.go b/src/pkg/syscall/syscall_linux_arm.go
index 3b4573e..e3c1c03 100644
--- a/src/pkg/syscall/syscall_linux_arm.go
+++ b/src/pkg/syscall/syscall_linux_arm.go
@@ -58,6 +58,10 @@
 //sys	Stat(path string, stat *Stat_t) (errno int) = SYS_STAT64
 //sys	Statfs(path string, buf *Statfs_t) (errno int) = SYS_STATFS64
 
+// Vsyscalls on amd64.
+//sys	Gettimeofday(tv *Timeval) (errno int)
+//sys	Time(t *Time_t) (tt Time_t, errno int)
+
 // TODO(kaib): add support for tracing
 func (r *PtraceRegs) PC() uint64 { return 0 }