diff --git a/plugins/mongodb/mongo_mem b/plugins/mongodb/mongo_mem
index 61ea238e..61dafeb9 100755
--- a/plugins/mongodb/mongo_mem
+++ b/plugins/mongodb/mongo_mem
@@ -69,8 +69,8 @@ def doConfig():
     print("""
 graph_title MongoDB memory usage
 graph_args --base 1024 -l 0 --vertical-label Bytes
-graph_category mongodb
-""")
+graph_category %s
+""" % os.getenv('graph_category', 'mongodb'))
 
     for k in getServerStatus()["mem"]:
         if ok( k ):