--- sys/kern/subr_terminal.c.orig	2013-08-19 19:08:24.458329184 +0200
+++ sys/kern/subr_terminal.c	2013-08-19 18:45:28.244949868 +0200
@@ -408,6 +408,8 @@
 static cn_term_t	termcn_term;
 static cn_getc_t	termcn_getc;
 static cn_putc_t	termcn_putc;
+static cn_grab_t	termcn_grab;
+static cn_ungrab_t	termcn_ungrab;
 
 const struct consdev_ops termcn_ops = {
 	.cn_probe	= termcn_probe,
@@ -415,6 +417,8 @@
 	.cn_term	= termcn_term,
 	.cn_getc	= termcn_getc,
 	.cn_putc	= termcn_putc,
+	.cn_grab	= termcn_grab,
+	.cn_ungrab	= termcn_ungrab,
 };
 
 static void
@@ -464,6 +468,16 @@
 	tm->tm_class->tc_done(tm);
 }
 
+static void
+termcn_grab(struct consdev *cp)
+{
+}
+
+static void
+termcn_ungrab(struct consdev *cp)
+{
+}
+
 /*
  * Binding with the terminal emulator.
  */