diff --git a/cpu/nios2/start.S b/cpu/nios2/start.S
index ea41435..31cd5b0 100644
--- a/cpu/nios2/start.S
+++ b/cpu/nios2/start.S
@@ -23,6 +23,7 @@
 
 
 #include <config.h>
+#include <timestamp.h>
 #include <version.h>
 
 /*************************************************************************
@@ -212,5 +213,5 @@
 
 version_string:
 	.ascii U_BOOT_VERSION
-	.ascii " (", __DATE__, " - ", __TIME__, ")"
+	.ascii " (", U_BOOT_DATE, " - ", U_BOOT_TIME, ")"
 	.ascii CONFIG_IDENT_STRING, "\0"