diff --git a/src/syscall/exec_linux.go b/src/syscall/exec_linux.go
index 66fb0356ba..5f53eaaa36 100644
--- a/src/syscall/exec_linux.go
+++ b/src/syscall/exec_linux.go
@@ -342,7 +342,7 @@ func forkAndExecInChild(argv0 *byte, argv, envv []*byte, chroot, dir *byte, attr
 
 	// Set the controlling TTY to Ctty
 	if sys.Setctty {
-		_, _, err1 = RawSyscall(SYS_IOCTL, uintptr(sys.Ctty), uintptr(TIOCSCTTY), 0)
+		_, _, err1 = RawSyscall(SYS_IOCTL, uintptr(sys.Ctty), uintptr(TIOCSCTTY), 1)
 		if err1 != 0 {
 			goto childerror
 		}