diff --git a/glib/m4macros/glib-gettext.m4 b/glib/m4macros/glib-gettext.m4
index 5217fd8434817880461333c01b3c0164a6603ddf..9f39b5f1f292d07972dceccfad09627ad5ce8852 100644
--- a/glib/m4macros/glib-gettext.m4
+++ b/glib/m4macros/glib-gettext.m4
@@ -36,8 +36,8 @@ dnl We go to great lengths to make sure that aclocal won't
 dnl try to pull in the installed version of these macros
 dnl when running aclocal in the glib directory.
 dnl
-m4_copy([AC_DEFUN],[glib_DEFUN])
-m4_copy([AC_REQUIRE],[glib_REQUIRE])
+m4_copy_force([AC_DEFUN],[glib_DEFUN])
+m4_copy_force([AC_REQUIRE],[glib_REQUIRE])
 dnl
 dnl At the end, if we're not within glib, we'll define the public
 dnl definitions in terms of our private definitions.