diff --git a/lib_ppc/bootm.c b/lib_ppc/bootm.c
index 8974ccd81ce07f672bef9bdbaf307157ab0d808c..797715773d3304bf3939258b37cf089eaef19a10 100644
--- a/lib_ppc/bootm.c
+++ b/lib_ppc/bootm.c
@@ -557,7 +557,7 @@ static int boot_relocate_fdt (struct lmb *lmb, ulong bootmap_base,
 	if (fdt_blob >= (char *)CFG_BOOTMAPSZ)
 		relocate = 1;
 
-	of_len = be32_to_cpu (fdt_totalsize (fdt));
+	of_len = be32_to_cpu (fdt_totalsize (fdt_blob));
 
 	/* move flattend device tree if needed */
 	if (relocate) {