diff --git a/configure.ac b/configure.ac
index 670c0ae..aaf2900 100644
--- a/configure.ac
+++ b/configure.ac
@@ -16,5 +16,6 @@ m4_ifndef([XORG_MACROS_VERSION],
 XORG_MACROS_VERSION(1.3)
 XORG_DEFAULT_OPTIONS
 
-AC_OUTPUT([Makefile
+AC_CONFIG_FILES([Makefile
            xf86vidmodeproto.pc])
+AC_OUTPUT