diff --git a/RELNOTES b/RELNOTES
index 82c0aacd97e..838833f8db8 100644
--- a/RELNOTES
+++ b/RELNOTES
@@ -10,6 +10,23 @@ newline.  Entries should be separated by a newline.
 
 Changes to this file should not be MFCed.
 
+1ee62f354ab0:
+	ps(1)'s options '-a' and '-A', when combined with any other one
+	affecting the selection of processes except for '-X' and '-x', would
+	have no effect, in contradiction with the rule that one process is
+	listed as soon as any of the specified options selects it (inclusive
+	OR), which is both mandated by POSIX and arguably a natural expectation.
+	This bug has been fixed.
+
+	As a practical consequence, specifying '-a'/'-A' now causes all
+	processes to be listed regardless of other selection options (except for
+	'-X' and '-x', which still apply).  In particular, to list only
+	processes from specific jails, one must not use '-a' with '-J'.  Option
+	'-J', contrary to its apparent initial intent, never worked as a filter
+	in practice (except by accident with '-a' due to the bug), but instead
+	as any other selection options (e.g., '-U', '-p', '-G', etc.) subject to
+	the "inclusive OR" rule.
+
 a2132d91739d:
 	ps(1)'s '-U' option has been changed to select processes by their real
 	user IDs instead of their effective one, in accordance with POSIX and