diff --git a/cups/files/printer-details.py b/cups/files/printer-details.py
index da88a19..323303b 100755
--- a/cups/files/printer-details.py
+++ b/cups/files/printer-details.py
@@ -128,7 +128,7 @@ def getdata(name, addr, templates):
     baseoid = '.1.3.6.1.2.1.43.11.1.1'
     data += '<h2>Supplies</h2>\n'
     snmpdata = snmpwalk('public', addr, baseoid)
-    keys = map(lambda x: x[-1], filter(lambda x: x.startswith(
+    keys = map(lambda x: x.split('.')[-1], filter(lambda x: x.startswith(
         baseoid + '.6.1'), snmpdata.keys()))
     data += '<table>\n'
     for k in keys: