diff --git a/board/nokia/rx51/rx51.c b/board/nokia/rx51/rx51.c
index 3e419ef..c2e07db 100644
--- a/board/nokia/rx51/rx51.c
+++ b/board/nokia/rx51/rx51.c
@@ -585,7 +585,7 @@
  * Routine: rx51_kp_tstc
  * Description: Test if key was pressed (from buffer).
  */
-int rx51_kp_tstc(void)
+int rx51_kp_tstc(struct stdio_dev *sdev)
 {
 	u8 c, r, dk, i;
 	u8 intr;
@@ -641,10 +641,10 @@
  * Routine: rx51_kp_getc
  * Description: Get last pressed key (from buffer).
  */
-int rx51_kp_getc(void)
+int rx51_kp_getc(struct stdio_dev *sdev)
 {
 	keybuf_head %= KEYBUF_SIZE;
-	while (!rx51_kp_tstc())
+	while (!rx51_kp_tstc(sdev))
 		WATCHDOG_RESET();
 	return keybuf[keybuf_head++];
 }