diff --git a/openwrt/target/linux/linux-2.4/patches/ar7/000-ar7_support.patch b/openwrt/target/linux/linux-2.4/patches/ar7/000-ar7_support.patch
index 45052961ea..e06c7ee89a 100644
--- a/openwrt/target/linux/linux-2.4/patches/ar7/000-ar7_support.patch
+++ b/openwrt/target/linux/linux-2.4/patches/ar7/000-ar7_support.patch
@@ -3356,7 +3356,7 @@ diff -urN linux.old/drivers/char/serial.c linux.dev/drivers/char/serial.c
   * needed for certain old 386 machines, I've left these #define's
   * in....
   */
-+#ifdef CONFIG_AR7
++#ifndef CONFIG_AR7
  #define serial_inp(info, offset)		serial_in(info, offset)
  #define serial_outp(info, offset, value)	serial_out(info, offset, value)
 +#endif