diff --git a/usr/share/security-misc/lkrg/lkrg-virtualbox b/usr/share/security-misc/lkrg/lkrg-virtualbox
index 6ab093a..3e5edc3 100755
--- a/usr/share/security-misc/lkrg/lkrg-virtualbox
+++ b/usr/share/security-misc/lkrg/lkrg-virtualbox
@@ -6,6 +6,9 @@
 #set -x
 set -e
 
+## provides function: pkg_installed
+source /usr/libexec/helper-scripts/package_installed_check.bsh
+
 ## Check if the VirtualBox host software is installed.
 if ! command -v vboxmanage &>/dev/null ; then
    ## VirtualBox host software is not installed.
@@ -24,7 +27,9 @@ if ! test -f /usr/share/security-misc/lkrg/30-lkrg-virtualbox.conf ; then
    exit 0
 fi
 
-## TODO: check if lkrg is installed.
+if ! pkg_installed "lkrg" ; then
+   exit 0
+fi
 
 ## Delete using '--verbose' so user is notified.
 cp --verbose /usr/share/security-misc/lkrg/30-lkrg-virtualbox.conf /etc/sysctl.d/30-lkrg-virtualbox.conf