Index: languages/tcl/src/pmc/tclarray.pmc
===================================================================
--- languages/tcl/src/pmc/tclarray.pmc	(revision 15075)
+++ languages/tcl/src/pmc/tclarray.pmc	(working copy)
@@ -84,7 +84,7 @@
 
 Returns the PMC value for the element at C<*key>.
 
-XXX - Why is Hash's implementation insufficient here??
+XXX (#40638): - Why is Hash's implementation insufficient here??
 
 =cut