diff --git a/app/decorators.py b/app/decorators.py
index 8ebf5deab..220ece566 100644
--- a/app/decorators.py
+++ b/app/decorators.py
@@ -193,7 +193,7 @@ def scodoc7func(func):
                 # necessary for db ids and boolean values
                 try:
                     v = int(v)
-                except ValueError:
+                except (ValueError, TypeError):
                     pass
                 pos_arg_values.append(v)
         # current_app.logger.info("pos_arg_values=%s" % pos_arg_values)