diff --git a/drivers/macintosh/ans-lcd.c b/drivers/macintosh/ans-lcd.c
index 73c50bc02095..6a8221893256 100644
--- a/drivers/macintosh/ans-lcd.c
+++ b/drivers/macintosh/ans-lcd.c
@@ -3,6 +3,7 @@
  */
 
 #include <linux/types.h>
+#include <linux/smp_lock.h>
 #include <linux/errno.h>
 #include <linux/kernel.h>
 #include <linux/miscdevice.h>
@@ -119,6 +120,7 @@ anslcd_ioctl( struct inode * inode, struct file * file,
 static int
 anslcd_open( struct inode * inode, struct file * file )
 {
+	cycle_kernel_lock();
 	return 0;
 }