diff --git a/src/clipboard.c b/src/clipboard.c
index 4ce536a..d80699b 100644
--- a/src/clipboard.c
+++ b/src/clipboard.c
@@ -1266,6 +1266,7 @@
 
     for (p = p_cb; *p != NUL; )
     {
+	// Note: Keep this in sync with p_cb_values.
 	if (STRNCMP(p, "unnamed", 7) == 0 && (p[7] == ',' || p[7] == NUL))
 	{
 	    new_unnamed |= CLIP_UNNAMED;