diff --git a/annogen.py b/annogen.py
index a75583d48ede84b75c65ccf7e8ea0caef59c6850..f770017d8cbfbe59c11d45fe0238e1f2b090a8ec 100755
--- a/annogen.py
+++ b/annogen.py
@@ -1455,6 +1455,7 @@ def jsAnnot(alertStr,xtraDecls,textWalkInit,annotScan,case3,postFixCond=""):
     /* 3. Batch-fix any damage we did to existing ruby.
        Keep new title (at least for first word); normalise
        the markup so our 3-line option still works.
+       (TODO: this throws away hints at glossfile middle column e.g. chai1 vs cha4.  But only for the gloss line, and we do have an 'incomplete' warning.  Passing context in to every annotation call in an existing ruby could slow things down considerably.)
        Also ensure all ruby is space-separated like ours,
        so our padding CSS overrides don't give inconsistent results */
     if(nf) { ++subfixes;