diff --git a/drivers/tty/serial/atmel_serial.c b/drivers/tty/serial/atmel_serial.c
index c370eddc651b..2d09a89974a2 100644
--- a/drivers/tty/serial/atmel_serial.c
+++ b/drivers/tty/serial/atmel_serial.c
@@ -8,6 +8,7 @@
  *
  *  DMA support added by Chip Coldwell.
  */
+#include <linux/circ_buf.h>
 #include <linux/tty.h>
 #include <linux/ioport.h>
 #include <linux/slab.h>