diff --git a/include/linux/auto_fs4.h b/include/linux/auto_fs4.h
index d1c7b0ec7c22901e08c79cc446b0df7add2a616e..a1657fb99516ba445d3f35d9328348db0b2b4deb 100644
--- a/include/linux/auto_fs4.h
+++ b/include/linux/auto_fs4.h
@@ -23,7 +23,7 @@
 #define AUTOFS_MIN_PROTO_VERSION	3
 #define AUTOFS_MAX_PROTO_VERSION	4
 
-#define AUTOFS_PROTO_SUBVERSION         5
+#define AUTOFS_PROTO_SUBVERSION		6
 
 /* Mask for expire behaviour */
 #define AUTOFS_EXP_IMMEDIATE		1