diff --git a/src/buffer.h b/src/buffer.h
index de20ae7ae4f..38fb1e708ee 100644
--- a/src/buffer.h
+++ b/src/buffer.h
@@ -365,6 +365,8 @@ extern Lisp_Object Fget_file_buffer ();
 /* Functions to call before and after each text change. */
 extern Lisp_Object Vbefore_change_function;
 extern Lisp_Object Vafter_change_function;
+extern Lisp_Object Vbefore_change_functions;
+extern Lisp_Object Vafter_change_functions;
 extern Lisp_Object Vfirst_change_hook;
 extern Lisp_Object Qfirst_change_hook;