diff --git a/op-build-env b/op-build-env
index e6ca40e..2537c4f 100755
--- a/op-build-env
+++ b/op-build-env
@@ -14,6 +14,8 @@
 export BR2_EXTERNAL=${__PWD}/openpower
 export BR2_DL_DIR=${__PWD}/dl
 
+export LANG=en_US.UTF-8
+
 op-build () {
     make --directory=${__PWD}/buildroot O=${__PWD}/output $@
 }