diff --git a/drivers/s390/block/dasd_int.h b/drivers/s390/block/dasd_int.h
index ffd7723..8de29be 100644
--- a/drivers/s390/block/dasd_int.h
+++ b/drivers/s390/block/dasd_int.h
@@ -445,7 +445,7 @@
 	/* Device discipline stuff. */
 	struct dasd_discipline *discipline;
 	struct dasd_discipline *base_discipline;
-	char *private;
+	void *private;
 	struct dasd_path path_data;
 
 	/* Device state and target state. */