diff --git a/board/ti/am335x/board.c b/board/ti/am335x/board.c
index c33bf58..896b9b6 100644
--- a/board/ti/am335x/board.c
+++ b/board/ti/am335x/board.c
@@ -243,9 +243,11 @@
 #ifdef CONFIG_SPL_OS_BOOT
 int spl_start_uboot(void)
 {
+#ifdef CONFIG_SPL_SERIAL_SUPPORT
 	/* break into full u-boot on 'c' */
 	if (serial_tstc() && serial_getc() == 'c')
 		return 1;
+#endif
 
 #ifdef CONFIG_SPL_ENV_SUPPORT
 	env_init();