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diff --git a/ChangeLog b/ChangeLog
index 088e3b3134..5b20aa58e7 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2022-05-24  Paul Eggert  <eggert@cs.ucla.edu>
+
+	dfa: new options DFA_STAR_WARN, DFA_PLUS_WARN
+	This lets ‘grep -E '(*a|+b)'’ warn about the * and the +.
+	* lib/dfa.h (DFA_STAR_WARN, DFA_PLUS_WARN): New flags.
+	* lib/dfa.c (lex): Support them.
+
 2022-05-23  Paul Eggert  <eggert@cs.ucla.edu>
 
 	dfa: '\n' is not governed by RE_LIMITED_OPS