diff --git a/libc/kernel/uapi/linux/gsmmux.h b/libc/kernel/uapi/linux/gsmmux.h
index 6ddf1b9..8ff29fd 100644
--- a/libc/kernel/uapi/linux/gsmmux.h
+++ b/libc/kernel/uapi/linux/gsmmux.h
@@ -49,8 +49,20 @@
 #define GSMIOC_GETFIRST _IOR('G', 4, __u32)
 struct gsm_config_ext {
   __u32 keep_alive;
-  __u32 reserved[7];
+  __u32 wait_config;
+  __u32 reserved[6];
 };
 #define GSMIOC_GETCONF_EXT _IOR('G', 5, struct gsm_config_ext)
 #define GSMIOC_SETCONF_EXT _IOW('G', 6, struct gsm_config_ext)
+struct gsm_dlci_config {
+  __u32 channel;
+  __u32 adaption;
+  __u32 mtu;
+  __u32 priority;
+  __u32 i;
+  __u32 k;
+  __u32 reserved[8];
+};
+#define GSMIOC_GETCONF_DLCI _IOWR('G', 7, struct gsm_dlci_config)
+#define GSMIOC_SETCONF_DLCI _IOW('G', 8, struct gsm_dlci_config)
 #endif