lib/hanko/fingerprint.rb in hanko-0.1.1 vs lib/hanko/fingerprint.rb in hanko-0.1.2

@@ -19,10 +19,10 @@
       def cached_pon
         @cached_pon ||= {}
       end
 
       def generate_pon(assets_dir, source)
-        path = File.join(assets_dir, source)
+        path = File.join(assets_dir || '', source)
         File.exist?(path) ? file_digest(path) : ''
       end
 
       def file_digest(path)
         digest_class.file(path).hexdigest