Index: openacs-4/packages/categories/tcl/categories-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/categories/tcl/categories-procs.tcl,v
diff -u -r1.32 -r1.33
--- openacs-4/packages/categories/tcl/categories-procs.tcl	25 Apr 2018 19:47:46 -0000	1.32
+++ openacs-4/packages/categories/tcl/categories-procs.tcl	9 May 2018 15:33:30 -0000	1.33
@@ -379,7 +379,7 @@
     @return list of names corresponding to the list of category_id's supplied.
     @author Timo Hentschel (timo@timohentschel.de)
 } {
-    set result {}
+    set result [list]
     foreach category_id $category_ids {
         lappend result [category::get_name $category_id $locale]
     }