diff --git a/tools/build_uec.sh b/tools/build_uec.sh
index 33a6a27..ad35b2a 100755
--- a/tools/build_uec.sh
+++ b/tools/build_uec.sh
@@ -135,7 +135,7 @@ cat > $LIBVIRT_XML <<EOF
     </disk>
 
     <interface type='network'>
-      <source network='devstack-$GUEST_NETWORK'/>
+      <source network='$NET_NAME'/>
     </interface>
         
     <!-- The order is significant here.  File must be defined first -->