diff --git a/sinatra-contrib/lib/sinatra/decompile.rb b/sinatra-contrib/lib/sinatra/decompile.rb
new file mode 100644
index 00000000..056f9294
--- /dev/null
+++ b/sinatra-contrib/lib/sinatra/decompile.rb
@@ -0,0 +1,5 @@
+warn "Sinatra::Decompile is deprecated without replacement."
+
+def warn(message)
+  super "#{caller.first[/^[^:]:\d+:/]} warning: #{message}"
+end