diff --git a/shell-completion/bash/systemd-cgtop b/shell-completion/bash/systemd-cgtop
index c909260098..ca0a51e949 100644
--- a/shell-completion/bash/systemd-cgtop
+++ b/shell-completion/bash/systemd-cgtop
@@ -56,6 +56,11 @@ _systemd_cgtop() {
     fi
 
     COMPREPLY=( $(compgen -W '${OPTS[*]}' -- "$cur") )
+    if [ -d /sys/fs/cgroup/systemd/ ]; then
+        COMPREPLY+=( $(cd /sys/fs/cgroup/systemd/ && compgen -o nospace -o dirnames "$cur") )
+    elif [ -d /sys/fs/cgroup/ ]; then
+        COMPREPLY+=( $(cd /sys/fs/cgroup/ && compgen -o nospace -o dirnames "$cur") )
+    fi
 }
 
 complete -F _systemd_cgtop systemd-cgtop