diff --git a/Gemfile b/Gemfile
index 46441212..a1528f48 100644
--- a/Gemfile
+++ b/Gemfile
@@ -2,7 +2,7 @@ source "http://rubygems.org"
 
 gemspec
 
-gem "rake", '0.9.3.beta1'
+gem "rake", '0.9.3.beta.1'
 gem "rdoc"
 gem "mocha"
 gem "ruby-debug", :platform => :mri_18
diff --git a/lib/simple_form/inputs/collection_input.rb b/lib/simple_form/inputs/collection_input.rb
index d3821217..d89af303 100644
--- a/lib/simple_form/inputs/collection_input.rb
+++ b/lib/simple_form/inputs/collection_input.rb
@@ -89,7 +89,7 @@ module SimpleForm
       end
 
       def translate_collection
-        @collection = @collection.map {|value| [translate(:options, value.to_s), value.to_s]}
+        @collection = collection.map {|value| [translate(:options, value.to_s), value.to_s]}
       end
     end
   end