diff --git a/src/lisp.h b/src/lisp.h
index c071e6f0d46..81c5bf4dd8f 100644
--- a/src/lisp.h
+++ b/src/lisp.h
@@ -1456,6 +1456,7 @@ extern void signal_after_change ();
 /* Defined in xdisp.c */
 extern Lisp_Object Vmessage_log_max;
 extern void message ();
+extern void message_nolog ();
 extern void message1 ();
 extern void message1_nolog ();
 extern void message2 ();