diff --git a/configs/Cubieboard2_defconfig b/configs/Cubieboard2_defconfig
index 78eaaf4379..8f8930caf9 100644
--- a/configs/Cubieboard2_defconfig
+++ b/configs/Cubieboard2_defconfig
@@ -20,3 +20,4 @@ CONFIG_SUN7I_GMAC=y
 CONFIG_SCSI=y
 CONFIG_USB_EHCI_HCD=y
 CONFIG_SYS_USB_EVENT_POLL_VIA_INT_QUEUE=y
+CONFIG_MMC_SUNXI_SLOT_EXTRA=2
