diff --git a/cpu/mcf547x_8x/start.S b/cpu/mcf547x_8x/start.S
index 41fc694..94ef14b 100644
--- a/cpu/mcf547x_8x/start.S
+++ b/cpu/mcf547x_8x/start.S
@@ -22,6 +22,7 @@
  */
 
 #include <config.h>
+#include <timestamp.h>
 #include "version.h"
 
 #ifndef	 CONFIG_IDENT_STRING
@@ -357,6 +358,6 @@
 	.globl	version_string
 version_string:
 	.ascii U_BOOT_VERSION
-	.ascii " (", __DATE__, " - ", __TIME__, ")"
+	.ascii " (", U_BOOT_DATE, " - ", U_BOOT_TIME, ")"
 	.ascii CONFIG_IDENT_STRING, "\0"
 	.align 4