diff --git a/lib/fog/aws/storage.rb b/lib/fog/aws/storage.rb
index ba797157a..996a3f17c 100644
--- a/lib/fog/aws/storage.rb
+++ b/lib/fog/aws/storage.rb
@@ -352,7 +352,7 @@ DATA
           string_to_sign << canonical_resource
 
           signed_string = @hmac.sign(string_to_sign)
-          signature = Base64.encode64(signed_string).chomp!
+          Base64.encode64(signed_string).chomp!
         end
 
         private