diff --git a/include/linux/tifm.h b/include/linux/tifm.h
index 2a19698..6b3a318 100644
--- a/include/linux/tifm.h
+++ b/include/linux/tifm.h
@@ -63,6 +63,7 @@
 
 #define TIFM_CTRL_LED             0x00000040
 #define TIFM_CTRL_FAST_CLK        0x00000100
+#define TIFM_CTRL_POWER_MASK      0x00000007
 
 #define TIFM_SOCK_STATE_OCCUPIED  0x00000008
 #define TIFM_SOCK_STATE_POWERED   0x00000080