diff -Nru linux-2.4.20/include/linux/netfilter.h linux-2.4.20-pom2patch/include/linux/netfilter.h
--- linux-2.4.20/include/linux/netfilter.h	2001-11-22 13:47:48.000000000 -0600
+++ linux-2.4.20-pom2patch/include/linux/netfilter.h	2003-05-02 12:54:56.000000000 -0500
@@ -19,9 +19,10 @@
 #define NF_REPEAT 4
 #define NF_MAX_VERDICT NF_REPEAT
 
-/* Generic cache responses from hook functions. */
-#define NFC_ALTERED 0x8000
+/* Generic cache responses from hook functions.
+   <= 0x2000 is used for protocol-flags. */
 #define NFC_UNKNOWN 0x4000
+#define NFC_ALTERED 0x8000
 
 #ifdef __KERNEL__
 #include <linux/config.h>
