Index: openacs-4/packages/xowiki/tcl/package-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/xowiki/tcl/package-procs.tcl,v
diff -u -N -r1.332.2.78 -r1.332.2.79
--- openacs-4/packages/xowiki/tcl/package-procs.tcl	20 Apr 2021 08:56:17 -0000	1.332.2.78
+++ openacs-4/packages/xowiki/tcl/package-procs.tcl	20 Apr 2021 09:20:34 -0000	1.332.2.79
@@ -2422,8 +2422,9 @@
     set description [:get_parameter PackageDescription ""]
 
     if {![info exists days] &&
-        [regexp {[^0-9]*([0-9]+)d} [:query_parameter rss] _ days]} {
+        [string is integer -strict [:query_parameter rss]]} {
       # setting the variable days
+      set days [:query_parameter rss]
     } else {
       set days 10
     }