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-rw-r--r--usr.sbin/ppp/proto.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/usr.sbin/ppp/proto.h b/usr.sbin/ppp/proto.h
index 8380dff4a2bb..8c9332769857 100644
--- a/usr.sbin/ppp/proto.h
+++ b/usr.sbin/ppp/proto.h
@@ -41,7 +41,7 @@
#define PROTO_ICOMPD 0x00fb /* Individual link compressed */
#define PROTO_COMPD 0x00fd /* Compressed datagram */
-#define PROTO_COMPRESSIBLE(p) (((p) & 0xffe1) == 0x21)
+#define PROTO_COMPRESSIBLE(p) (((p) & 0xff81) == 0x01)
#define PROTO_IPCP 0x8021
#ifndef NOINET6