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-rw-r--r--lisp/emacs-lisp/byte-opt.el3
1 files changed, 2 insertions, 1 deletions
diff --git a/lisp/emacs-lisp/byte-opt.el b/lisp/emacs-lisp/byte-opt.el
index 33d49647638..44cca6136c0 100644
--- a/lisp/emacs-lisp/byte-opt.el
+++ b/lisp/emacs-lisp/byte-opt.el
@@ -879,7 +879,8 @@
(put 'symbolp 'byte-optimizer 'byte-optimize-predicate)
(put 'stringp 'byte-optimizer 'byte-optimize-predicate)
(put 'string< 'byte-optimizer 'byte-optimize-predicate)
-(put 'string-lessp 'byte-optimizer 'byte-optimize-predicate)
+(put 'string-lessp 'byte-optimizer 'byte-optimize-predicate)
+(put 'proper-list-p 'byte-optimizer 'byte-optimize-predicate)
(put 'logand 'byte-optimizer 'byte-optimize-predicate)
(put 'logior 'byte-optimizer 'byte-optimize-predicate)