diff --git a/src/ex_getln.c b/src/ex_getln.c
index ad3a310..5baffa7 100644
--- a/src/ex_getln.c
+++ b/src/ex_getln.c
@@ -2650,6 +2650,7 @@
 
     for (p = p_wim; *p; ++p)
     {
+	// Note: Keep this in sync with p_wim_values.
 	for (i = 0; ASCII_ISALPHA(p[i]); ++i)
 	    ;
 	if (p[i] != NUL && p[i] != ',' && p[i] != ':')