diff --git a/lib/mogrify.ex b/lib/mogrify.ex
index 8e1e1d7..4c409c9 100644
--- a/lib/mogrify.ex
+++ b/lib/mogrify.ex
@@ -193,6 +193,7 @@ defmodule Mogrify do
     do: ["-annotate"] ++ String.split(params, " ", parts: 2)
 
   defp normalize_arguments({"histogram:" <> option, nil}), do: ["histogram:#{option}"]
+  defp normalize_arguments({"label", params}), do: ["label:#{params}"]
   defp normalize_arguments({"pango", params}), do: ["pango:#{params}"]
   defp normalize_arguments({"stdout", params}), do: ["#{params}"]
   defp normalize_arguments({"plasma", params}), do: ["plasma:#{params}"]