diff --git a/plugins/sphinx/sphindex_ b/plugins/sphinx/sphindex_
index 54ab773c..a924f561 100755
--- a/plugins/sphinx/sphindex_
+++ b/plugins/sphinx/sphindex_
@@ -40,9 +40,12 @@ indexName = progName[progName.find("_")+1:]
 if len(sys.argv) == 2 and sys.argv[1] == "autoconf":
     print "yes"
 elif len(sys.argv) == 2 and sys.argv[1] == "config":
+    warning = "0:"
     critical = "0:"
+    if "warning" in os.environ and os.environ["warning"] != None:
+        warning = os.environ["warning"]
     if "critical" in os.environ and os.environ["critical"] != None:
-        warning = os.environ["critical"]
+        critical = os.environ["critical"]
 
     print "graph_title Sphinx index %s stats" % indexName
     print "graph_vlabel docs count"