diff --git a/lib/geocoder/results/nominatim.rb b/lib/geocoder/results/nominatim.rb
index 6ba412b5f646a255aa45c32daee96a5193ab3751..0826754cb0313a8bd81b308fd235436965e196e6 100644
--- a/lib/geocoder/results/nominatim.rb
+++ b/lib/geocoder/results/nominatim.rb
@@ -80,7 +80,7 @@ module Geocoder::Result
     end
 
     define_method 'class' do
-      warn "Method 'class' is deprecated. Use 'place_class' instead"
+      warn "DEPRECATION WARNING: The 'class' method of Geocoder::Result::Nominatim objects is deprecated and will be removed in Geocoder version 1.2.0. Please use 'place_class' instead."
       @data['class']
     end