diff --git a/RIGS/templatetags/filters.py b/RIGS/templatetags/filters.py
index a6be41ae..404bbd5e 100644
--- a/RIGS/templatetags/filters.py
+++ b/RIGS/templatetags/filters.py
@@ -76,7 +76,7 @@ def orderby(request, field, attr):
 
     dict_ = request.GET.copy()
 
-    if dict_[field] == attr:
+    if dict_.__contains__(field) and dict_[field] == attr:
         if not dict_[field].startswith("-"):
             dict_[field] = "-" + attr
         else: