diff --git a/include/psci.h b/include/psci.h
index 922f95f..6fe1d8a 100644
--- a/include/psci.h
+++ b/include/psci.h
@@ -47,9 +47,15 @@
 #define PSCI_MIG_INFO_TYPE		0x84000006
 #define PSCI_MIG_INFO_UP_CPU_AARCH32	0x84000007
 #define PSCI_MIG_INFO_UP_CPU_AARCH64	0xc4000007
-#define PSCI_SYSTEM_OFF		0x84000008
+#define PSCI_SYSTEM_OFF			0x84000008
 #define PSCI_SYSTEM_RESET		0x84000009
 
+/*
+ * Number of PSCI calls (above) implemented. System off and reset aren't
+ * implemented as yet
+ */
+#define PSCI_NUM_CALLS			13
+
 /*******************************************************************************
  * PSCI Migrate and friends
  ******************************************************************************/