diff --git a/include/linux/mmc/tmio.h b/include/linux/mmc/tmio.h
index 551490f..3ae3776 100644
--- a/include/linux/mmc/tmio.h
+++ b/include/linux/mmc/tmio.h
@@ -30,6 +30,7 @@
 #define CTL_TRANSACTION_CTL 0x34
 #define CTL_SDIO_STATUS 0x36
 #define CTL_SDIO_IRQ_MASK 0x38
+#define CTL_DMA_ENABLE 0xd8
 #define CTL_RESET_SD 0xe0
 #define CTL_SDIO_REGS 0x100
 #define CTL_CLK_AND_WAIT_CTL 0x138