diff --git a/src/etc/inc/openvpn.attributes.php b/src/etc/inc/openvpn.attributes.php
index 9fe4adc5f..2f5d71968 100644
--- a/src/etc/inc/openvpn.attributes.php
+++ b/src/etc/inc/openvpn.attributes.php
@@ -25,6 +25,7 @@
         ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
         POSSIBILITY OF SUCH DAMAGE.
 */
+require_once("util.inc");
 
 if (empty($common_name)) {
 	$common_name = getenv("common_name");
diff --git a/src/etc/inc/openvpn.auth-user.php b/src/etc/inc/openvpn.auth-user.php
index f5cbf9bec..fc20195a9 100644
--- a/src/etc/inc/openvpn.auth-user.php
+++ b/src/etc/inc/openvpn.auth-user.php
@@ -37,6 +37,7 @@
 require_once("config.inc");
 require_once("radius.inc");
 require_once("auth.inc");
+require_once("util.inc");
 require_once("interfaces.inc");
 
 /**