diff --git a/isovar/isovar_result.py b/isovar/isovar_result.py
index <HASH>..<HASH> 100644
--- a/isovar/isovar_result.py
+++ b/isovar/isovar_result.py
@@ -188,7 +188,7 @@ class IsovarResult(object):
         ########################################################################
         for filter_name, filter_value in self.filter_values.items():
             d["filter:%s" % filter_name] = filter_value
-        d["pass"] = self.passes_all_filters
+        d["pass"] = d["passes_all_filters"] = self.passes_all_filters
 
         return d
alias 'pass' and 'passes_all_filters'