diff --git a/lib/cookie_extractor/browser_detector.rb b/lib/cookie_extractor/browser_detector.rb
index dcf9468..b64dfd9 100644
--- a/lib/cookie_extractor/browser_detector.rb
+++ b/lib/cookie_extractor/browser_detector.rb
@@ -8,7 +8,7 @@ module CookieExtractor
       if browser
         CookieExtractor.const_get("#{browser}CookieExtractor").new(db_filename)
       else
-        raise "Could not detect browser type."
+        raise BrowserNotDetectedException, "Could not detect browser type."
       end
     end