diff --git a/cpu/nios2/sysid.c b/cpu/nios2/sysid.c
index b5a2959..697ed03 100644
--- a/cpu/nios2/sysid.c
+++ b/cpu/nios2/sysid.c
@@ -40,7 +40,7 @@
 	stamp = readl (&sysid->timestamp);
 	localtime_r (&stamp, &t);
 	asctime_r (&t, asc);
-	printf ("SYSID : %08x, %s", readl (&sysid->id), asc);
+	printf ("SYSID : %08lx, %s", readl (&sysid->id), asc);
 
 }