diff --git a/cpu/mpc85xx/fdt.c b/cpu/mpc85xx/fdt.c
index c8d2c6a..c159934 100644
--- a/cpu/mpc85xx/fdt.c
+++ b/cpu/mpc85xx/fdt.c
@@ -229,7 +229,7 @@
 
 #ifdef CFG_NS16550
 	do_fixup_by_compat_u32(blob, "ns16550",
-		"clock-frequency", bd->bi_busfreq, 1);
+		"clock-frequency", CFG_NS16550_CLK, 1);
 #endif
 
 #ifdef CONFIG_CPM2