diff --git a/lib/google-analytics-rails.rb b/lib/google-analytics-rails.rb
index eb97e53..0370c82 100644
--- a/lib/google-analytics-rails.rb
+++ b/lib/google-analytics-rails.rb
@@ -34,7 +34,7 @@ def self.tracker=(tracker)
 
   # @return [Boolean]
   def self.valid_tracker?
-    tracker.nil? || tracker == "" || tracker == PLACEHOLDER_TRACKER ? false : true
+    tracker.present? && tracker != PLACEHOLDER_TRACKER
   end
 
   # @return [String]