1 files changed, 2 insertions, 1 deletions
diff --git a/sv.h b/sv.h
index 9a0cef72f5..f63d0580a6 100644
--- a/sv.h
+++ b/sv.h
@@ -274,7 +274,8 @@ struct xpvlv {
     STRLEN	xlv_targoff;
     STRLEN	xlv_targlen;
     SV*		xlv_targ;
-    char	xlv_type;
+    char	xlv_type;	/* k=keys .=pos x=substr v=vec /=join/re
+				 * y=alem/helem/iter t=tie T=tied HE */
 };
 
 struct xpvgv {