diff --git a/build_tools/make_build_h b/build_tools/make_build_h
index cd6391a883..a9b0419856 100755
--- a/build_tools/make_build_h
+++ b/build_tools/make_build_h
@@ -3,7 +3,7 @@ HOSTNAME=`uname -n`
 KERNEL=`uname -r`
 MACHINE=`uname -m`
 OS=`uname -s`
-USER=`whoami`
+USER=`id -un`
 DATE=`date -u "+%Y-%m-%d %H:%M:%S"`
 cat << END
 /*