Index: openacs-4/packages/forums/www/user-history.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/forums/www/user-history.tcl,v
diff -u -r1.14.2.1 -r1.14.2.2
--- openacs-4/packages/forums/www/user-history.tcl	12 Sep 2015 11:06:29 -0000	1.14.2.1
+++ openacs-4/packages/forums/www/user-history.tcl	21 May 2016 10:10:56 -0000	1.14.2.2
@@ -8,8 +8,14 @@
 
 } {
     user_id:naturalnum,notnull
-    {view "date"}
+    {view:word "date"}
     {groupby "forum_name"}
+} -validate {
+    valid_user -requires user_id {
+        if {![person::person_p -party_id $user_id]} {
+            ad_complain "Invalid user_id"
+        }
+    }
 }
 
 # Get user information