diff --git a/arch/arm/cpu/arm926ejs/mx28/spl_boot.c b/arch/arm/cpu/arm926ejs/mx28/spl_boot.c
index c9b45661b..a6dfca3f5 100644
--- a/arch/arm/cpu/arm926ejs/mx28/spl_boot.c
+++ b/arch/arm/cpu/arm926ejs/mx28/spl_boot.c
@@ -123,8 +123,10 @@ inline void board_init_r(gd_t *id, ulong dest_addr)
 		;
 }
 
+#ifndef CONFIG_SPL_SERIAL_SUPPORT
 void serial_putc(const char c) {}
 void serial_puts(const char *s) {}
+#endif
 void hang(void) __attribute__ ((noreturn));
 void hang(void)
 {