diff --git a/paramecio2/app.py b/paramecio2/app.py
index 442b7da..21b3648 100644
--- a/paramecio2/app.py
+++ b/paramecio2/app.py
@@ -73,7 +73,7 @@ def start_app():
         if config.application_root=='/':
             app.register_blueprint(app_name, url_prefix=added_app[2])
         else:
-            app.register_blueprint(app_name, url_prefix=config.application_root+'/'+added_app[2][1:])
+            app.register_blueprint(app_name, url_prefix=config.application_root+added_app[2][1:])
     """
         module_app=config.apps[added_app][0]