diff --git a/libc/kernel/common/linux/if_ether.h b/libc/kernel/common/linux/if_ether.h
index 1ba7a99..7e235a5 100644
--- a/libc/kernel/common/linux/if_ether.h
+++ b/libc/kernel/common/linux/if_ether.h
@@ -84,6 +84,7 @@
 #define ETH_P_TRAILER 0x001C  
 #define ETH_P_PHONET 0x00F5  
 #define ETH_P_IEEE802154 0x00F6  
+#define ETH_P_CAIF 0x00F7  
 
 struct ethhdr {
  unsigned char h_dest[ETH_ALEN];
diff --git a/libc/kernel/common/linux/socket.h b/libc/kernel/common/linux/socket.h
index b578df9..c30dae0 100644
--- a/libc/kernel/common/linux/socket.h
+++ b/libc/kernel/common/linux/socket.h
@@ -138,7 +138,8 @@
 #define AF_LLC 26  
 #define AF_TIPC 30  
 #define AF_BLUETOOTH 31  
-#define AF_MAX 32  
+#define AF_CAIF 38  
+#define AF_MAX 39  
 
 #define PF_UNSPEC AF_UNSPEC
 #define PF_UNIX AF_UNIX
@@ -170,6 +171,7 @@
 #define PF_LLC AF_LLC
 #define PF_TIPC AF_TIPC
 #define PF_BLUETOOTH AF_BLUETOOTH
+#define PF_CAIF AF_CAIF
 #define PF_MAX AF_MAX
 
 #define SOMAXCONN 128
diff --git a/libc/kernel/common/linux/tty.h b/libc/kernel/common/linux/tty.h
index b28791c..b1f2eab 100644
--- a/libc/kernel/common/linux/tty.h
+++ b/libc/kernel/common/linux/tty.h
@@ -12,4 +12,6 @@
 #ifndef _LINUX_TTY_H
 #define _LINUX_TTY_H
 
+#define N_CAIF 20  
+
 #endif