diff --git a/include/linux/key.h b/include/linux/key.h
index c45c962..1b70e35 100644
--- a/include/linux/key.h
+++ b/include/linux/key.h
@@ -299,6 +299,7 @@
 #define key_validate(k)			0
 #define key_serial(k)			0
 #define key_get(k) 			({ NULL; })
+#define key_revoke(k)			do { } while(0)
 #define key_put(k)			do { } while(0)
 #define key_ref_put(k)			do { } while(0)
 #define make_key_ref(k, p)			({ NULL; })