diff --git a/lisp/progmodes/octave.el b/lisp/progmodes/octave.el
index c768d8d6f4d..f5d764e16c3 100644
--- a/lisp/progmodes/octave.el
+++ b/lisp/progmodes/octave.el
@@ -1165,6 +1165,8 @@ q: Don't fix\n" func file))
   "Face used to highlight function comment block.")
 
 (eval-when-compile (require 'texinfo))
+;; Undo the effects of texinfo loading tex-mode loading compile.
+(declare-function compilation-forget-errors "compile" ())
 
 (defun octave-font-lock-texinfo-comment ()
   (let ((kws