diff --git a/lib/pouf.rb b/lib/pouf.rb
index e4ddd4e..4dcfe14 100644
--- a/lib/pouf.rb
+++ b/lib/pouf.rb
@@ -35,7 +35,7 @@ def play_sound filename, cmd=nil
 
     def alias2filename name
       fns = Dir["#{sounds_dir}/#{name}.*"]
-      fns.first if fns
+      fns.sort.first if fns
     end
 
     def filename2alias fname