diff --git a/muninlite.in b/muninlite.in
index 6b6e376..1bd1b26 100755
--- a/muninlite.in
+++ b/muninlite.in
@@ -78,7 +78,11 @@ RES=""
 for PLUG in $PLUGINS; do
   case "$PLUG" in
     if_|if_err_)
-      interface_names=$(sed 's/^ *//; s/:.*$//; / /d; /^lo$/d' /proc/net/dev)
+      if [ -z "$INTERFACE_NAMES_OVERRIDE" ]; then
+        interface_names=$(sed 's/^ *//; s/:.*$//; / /d; /^lo$/d' /proc/net/dev)
+      else
+        interface_names="$INTERFACE_NAMES_OVERRIDE"
+      fi
       for INTER in $interface_names; do
         INTERRES=$(echo "$INTER" | sed -e 's/\./VLAN/' -e 's/\-/_/g')
         RES="$RES ${PLUG}${INTERRES}"