diff --git a/hw/sd.c b/hw/sd.c
index de7dd89c18..0c770bc0a5 100644
--- a/hw/sd.c
+++ b/hw/sd.c
@@ -421,6 +421,7 @@ SDState *sd_init(BlockDriverState *bs, int is_spi)
     sd = (SDState *) qemu_mallocz(sizeof(SDState));
     sd->buf = qemu_memalign(512, 512);
     sd->spi = is_spi;
+    sd->enable = 1;
     sd_reset(sd, bs);
     bdrv_set_change_cb(sd->bdrv, sd_cardchange, sd);
     return sd;