diff --git a/lib/redistat/key.rb b/lib/redistat/key.rb
index bec4deb..f22921b 100644
--- a/lib/redistat/key.rb
+++ b/lib/redistat/key.rb
@@ -53,7 +53,8 @@ module Redistat
     end
     
     def children
-      db.smembers("#{scope}#{LABEL_INDEX}#{@label}").map { |member|
+      members = db.smembers("#{scope}#{LABEL_INDEX}#{@label}") || [] # older versions of Redis returns nil
+      members.map { |member|
         child_label = [@label, member].reject { |i| i.nil? }
         self.class.new(self.scope, child_label.join(GROUP_SEPARATOR), self.date, @options)
       }