Index: openacs-4/packages/notifications/tcl/notification-request-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/notifications/tcl/notification-request-procs.tcl,v
diff -u -r1.11 -r1.11.10.1
--- openacs-4/packages/notifications/tcl/notification-request-procs.tcl	12 Sep 2006 18:13:38 -0000	1.11
+++ openacs-4/packages/notifications/tcl/notification-request-procs.tcl	27 Aug 2013 12:20:39 -0000	1.11.10.1
@@ -28,7 +28,7 @@
     } {
         set request_id [get_request_id -type_id $type_id -object_id $object_id -user_id $user_id]
 
-        if {[empty_string_p $request_id]} {
+        if {$request_id eq ""} {
             # Set up the vars
             set extra_vars [ns_set create]
             oacs_util::vars_to_ns_set -ns_set $extra_vars -var_list {request_id type_id user_id object_id interval_id delivery_method_id format dynamic_p}