diff --git a/.gitignore b/.gitignore
index b2a78bd..6a940a4 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,3 +3,4 @@ usb-modeswitch-1.1.4.tar.bz2
 /usb-modeswitch-1.1.6.tar.bz2
 /usb-modeswitch-1.1.7.tar.bz2
 /usb-modeswitch-1.1.9.tar.bz2
+/device_reference.txt
diff --git a/sources b/sources
index 925f188..da3cdaa 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-76f6978f18cac41f269a346a5d0f1052  usb-modeswitch-1.1.9.tar.bz2
+1e30393ce1e4a9abde26ee4682784e8a  device_reference.txt