diff --git a/plugins/mongodb/mongo_ops b/plugins/mongodb/mongo_ops
index 99500bfe..cf23a1e6 100755
--- a/plugins/mongodb/mongo_ops
+++ b/plugins/mongodb/mongo_ops
@@ -68,9 +68,9 @@ def doConfig():
 graph_title MongoDB ops
 graph_args --base 1000 -l 0
 graph_vlabel ops / ${graph_period}
-graph_category db
+graph_category %s
 graph_total total
-""")
+""" % os.getenv('graph_category', 'db'))
 
     for k in getServerStatus()["opcounters"]:
         print(k + ".label " + k)