diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index 6716bd1..de32e6a 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -66,6 +66,7 @@
 
 #define MMC_SIGNAL_VOLTAGE_330	0
 #define MMC_SIGNAL_VOLTAGE_180	1
+#define MMC_SIGNAL_VOLTAGE_120	2
 
 	unsigned char	drv_type;		/* driver type (A, B, C, D) */