diff --git a/include/linux/ide.h b/include/linux/ide.h
index b9f66c1..0665428 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -723,6 +723,7 @@
 	/* driver soft-power interface */
 	int	(*busproc)(ide_drive_t *, int);
 #endif
+	u8 (*mdma_filter)(ide_drive_t *);
 	u8 (*udma_filter)(ide_drive_t *);
 
 	void (*ata_input_data)(ide_drive_t *, void *, u32);