Index: openacs-4/packages/dotlrn/www/index.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/dotlrn/www/index.tcl,v
diff -u -r1.48.4.1 -r1.48.4.2
--- openacs-4/packages/dotlrn/www/index.tcl	11 Sep 2015 11:40:44 -0000	1.48.4.1
+++ openacs-4/packages/dotlrn/www/index.tcl	26 Jan 2017 08:53:27 -0000	1.48.4.2
@@ -22,7 +22,7 @@
     @version $Id$
 } -query {
     {filter ""}
-    {page_num 0}
+    {page_num:naturalnum,notnull 0}
 }
 
 # Used to keep track of navigation links
Index: openacs-4/packages/dotlrn/www/one-community.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/dotlrn/www/one-community.tcl,v
diff -u -r1.36.8.1 -r1.36.8.2
--- openacs-4/packages/dotlrn/www/one-community.tcl	11 Sep 2015 11:40:45 -0000	1.36.8.1
+++ openacs-4/packages/dotlrn/www/one-community.tcl	26 Jan 2017 08:53:27 -0000	1.36.8.2
@@ -23,7 +23,7 @@
     @creation-date 2001-10-04
     @version $Id$
 } -query {
-    {page_num 0}
+    {page_num:naturalnum,notnull 0}
 }
 
 # Check that this is a community type