diff --git a/share/updateall/scripts.d/apt b/share/updateall/scripts.d/apt
index ea78057..406b7fe 100755
--- a/share/updateall/scripts.d/apt
+++ b/share/updateall/scripts.d/apt
@@ -1,5 +1,5 @@
 #!/bin/sh
-[ "$USER" != root ] && exec sudo "$0" "$@"
+[ "$(whoami)" != root ] && exec sudo "$0" "$@"
 apt-get update
 apt-get upgrade
 apt-get autoremove
diff --git a/share/updateall/scripts.d/docker b/share/updateall/scripts.d/docker
index 12ac4aa..f51b557 100755
--- a/share/updateall/scripts.d/docker
+++ b/share/updateall/scripts.d/docker
@@ -1,4 +1,4 @@
 #!/bin/sh
-[ "$USER" != root ] && exec "$0" "$@"
+[ "$(whoami)" != root ] && exec "$0" "$@"
 docker images --format '{{.Repository}}' | xargs -L 1 docker pull