diff --git a/conf/machine/include/ast2400.inc b/conf/machine/include/ast2400.inc
index d315686..6284a2b 100644
--- a/conf/machine/include/ast2400.inc
+++ b/conf/machine/include/ast2400.inc
@@ -2,5 +2,3 @@
 include conf/machine/include/soc-family.inc
 require conf/machine/include/aspeed.inc
 require conf/machine/include/tune-arm926ejs.inc
-
-UBOOT_MACHINE ?= "ast_g4_ncsi_config"
diff --git a/conf/machine/include/ast2500.inc b/conf/machine/include/ast2500.inc
index 924b6bf..0724157 100644
--- a/conf/machine/include/ast2500.inc
+++ b/conf/machine/include/ast2500.inc
@@ -2,5 +2,3 @@
 include conf/machine/include/soc-family.inc
 require conf/machine/include/aspeed.inc
 require conf/machine/include/tune-arm1176jz-s.inc
-
-UBOOT_MACHINE ?= "ast_g5_ncsi_config"