diff --git a/make/config.amd64.mk b/make/config.amd64.mk
index 5648d13f..9c9850c5 100644
--- a/make/config.amd64.mk
+++ b/make/config.amd64.mk
@@ -6,5 +6,6 @@
 include $(ONL)/make/config.mk
 export TOOLCHAIN := x86_64-linux-gnu
 export ARCH := amd64
+export UARCH := AMD64
 
 
diff --git a/make/config.powerpc.mk b/make/config.powerpc.mk
index 29f0a0ec..2f2aa89c 100644
--- a/make/config.powerpc.mk
+++ b/make/config.powerpc.mk
@@ -6,5 +6,6 @@
 include $(ONL)/make/config.mk
 export TOOLCHAIN := powerpc-linux-gnu
 export ARCH := powerpc
+export UARCH := PPC