diff --git a/plugins/system/cpubyuser b/plugins/system/cpubyuser
index 424bc2cf..c2522233 100755
--- a/plugins/system/cpubyuser
+++ b/plugins/system/cpubyuser
@@ -7,6 +7,8 @@
 #		[cpubyuser]
 #		env.USERS root yann
 #
+#        If env.USERS is set to ALL, count all logged in users.
+#
 #	 root and yann being a list of the users to monitor.
 #	 You need to also make sure that awk is installed
 #
@@ -70,6 +72,10 @@ if [ "$1" = "config" ]; then
 	exit
 fi
 
+if [ "$USERS" = "ALL" ]; then
+       USERS=$( w | awk '{ print $1 }' )
+fi
+
 top -b -n 1 | tail -n +8 | \
 	awk -v USERS="$USERS" '
 		{ if ($2 != "USER") CPU_USER[$2]+=$9 }