diff --git a/include/linux/fscache-cache.h b/include/linux/fscache-cache.h
index a9ff9a3..7823e9e 100644
--- a/include/linux/fscache-cache.h
+++ b/include/linux/fscache-cache.h
@@ -251,6 +251,10 @@
 	/* unpin an object in the cache */
 	void (*unpin_object)(struct fscache_object *object);
 
+	/* check the consistency between the backing cache and the FS-Cache
+	 * cookie */
+	bool (*check_consistency)(struct fscache_operation *op);
+
 	/* store the updated auxiliary data on an object */
 	void (*update_object)(struct fscache_object *object);