diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index 21e6d1b3b393..258355c5a93a 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -1612,6 +1612,7 @@ static int lo_compat_ioctl(struct block_device *bdev, fmode_t mode,
 		arg = (unsigned long) compat_ptr(arg);
 	case LOOP_SET_FD:
 	case LOOP_CHANGE_FD:
+	case LOOP_SET_BLOCK_SIZE:
 		err = lo_ioctl(bdev, mode, cmd, arg);
 		break;
 	default: