diff --git a/sys/compat/linuxkpi/common/include/linux/errno.h b/sys/compat/linuxkpi/common/include/linux/errno.h
--- a/sys/compat/linuxkpi/common/include/linux/errno.h
+++ b/sys/compat/linuxkpi/common/include/linux/errno.h
@@ -35,6 +35,7 @@
 
 #define	EBADRQC		56	/* Bad request code */
 #define	EBADSLT		57	/* Invalid slot */
+#define	ENOKEY		126	/* Required key not available */
 
 #define	ECHRNG		EDOM
 #define	ETIME		ETIMEDOUT