diff --git a/sys/pc98/pc98/syscons.c b/sys/pc98/pc98/syscons.c
index 8eef1dbddcd5..621acf070114 100644
--- a/sys/pc98/pc98/syscons.c
+++ b/sys/pc98/pc98/syscons.c
@@ -25,7 +25,7 @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
- *  $Id: syscons.c,v 1.44 1997/07/07 12:47:36 kato Exp $
+ *  $Id: syscons.c,v 1.45 1997/07/09 14:43:19 kato Exp $
  */
 
 #include "sc.h"
@@ -1102,6 +1102,8 @@ scioctl(dev_t dev, int cmd, caddr_t data, int flag, struct proc *p)
 
     case CONS_HISTORY:  	/* set history size */
 	if (*data) {
+            if (cur_console->status & BUFFER_SAVED)
+                return EBUSY;
 	    if (scp->history != NULL)
 		free(scp->history, M_DEVBUF);
 #ifdef PC98