diff --git a/lib/transmission-rss/aggregator.rb b/lib/transmission-rss/aggregator.rb
index 2101b6b..a8993ef 100644
--- a/lib/transmission-rss/aggregator.rb
+++ b/lib/transmission-rss/aggregator.rb
@@ -113,7 +113,7 @@ def process_link(feed, item)
       link = link.href if link.class != String
       
       # Determine whether to use guid or link as seen hash
-      seen_value = !!feed.seen_by_guid ? (item.guid.content rescue item.guid || link).to_s : link
+      seen_value = feed.seen_by_guid ? (item.guid.content rescue item.guid || link).to_s : link
       
       # The link is not in +@seen+ Array.
       unless @seen.include?(seen_value)
diff --git a/lib/transmission-rss/feed.rb b/lib/transmission-rss/feed.rb
index a382b32..0bf0b0a 100644
--- a/lib/transmission-rss/feed.rb
+++ b/lib/transmission-rss/feed.rb
@@ -12,8 +12,6 @@ def initialize(config = {})
         @url = URI.escape(URI.unescape(config['url'] || config.keys.first))
 
         @download_path = config['download_path']
-        @validate_cert = config['validate_cert'].nil? || !!config['validate_cert']
-        @seen_by_guid = !!config['seen_by_guid']
 
         matchers = Array(config['regexp']).map do |e|
           e.is_a?(String) ? e : e['matcher']
@@ -26,6 +24,9 @@ def initialize(config = {})
         @config = {}
         @url = config.to_s
       end
+
+      @validate_cert = @config['validate_cert'].nil? || !!@config['validate_cert']
+      @seen_by_guid = !!@config['seen_by_guid']
     end
 
     def download_path(title = nil)
diff --git a/spec/feed_spec.rb b/spec/feed_spec.rb
index 58de3ab..d3d93a3 100644
--- a/spec/feed_spec.rb
+++ b/spec/feed_spec.rb
@@ -15,8 +15,8 @@
     expect(feed.config).not_to be_nil
     expect(feed.download_path).to be_nil
     expect(feed.regexp).to be_nil
-    expect(feed.validate_cert).to be_nil
-    expect(feed.seen_by_guid).to be_nil
+    expect(feed.validate_cert).to eq(true)
+    expect(feed.seen_by_guid).to eq(false)
   end
 
   it 'should be able to parse encoded url' do