1 files changed, 2 insertions, 0 deletions

diff --git a/src/buffer.c b/src/buffer.c
index 4ae5e811b07..d1c41380188 100644
--- a/src/buffer.c
+++ b/src/buffer.c
@@ -5079,6 +5079,8 @@ init_buffer_once (void)
 {
   int idx;
 
+  /* Items flagged permanent get an explicit permanent-local property
+     added in bindings.el, for clarity.  */
   memset (buffer_permanent_local_flags, 0, sizeof buffer_permanent_local_flags);
 
   /* 0 means not a lisp var, -1 means always local, else mask.  */