diff --git a/encoding.h b/encoding.h
index 63d59013..955459b5 100644
--- a/encoding.h
+++ b/encoding.h
@@ -214,6 +214,17 @@
 #define MHPMEVENTH_MINH  0x40000000
 #define MHPMEVENTH_OF    0x80000000
 
+#define MCOUNTEREN_CY_SHIFT    0
+#define MCOUNTEREN_TIME_SHIFT  1
+#define MCOUNTEREN_IR_SHIFT    2
+
+#define MCOUNTEREN_CY      (1U << MCOUNTEREN_CY_SHIFT)
+#define MCOUNTEREN_TIME    (1U << MCOUNTEREN_TIME_SHIFT)
+#define MCOUNTEREN_IR      (1U << MCOUNTEREN_IR_SHIFT)
+
+#define MCOUNTINHIBIT_CY    MCOUNTEREN_CY
+#define MCOUNTINHIBIT_IR    MCOUNTEREN_IR
+
 #define HENVCFG_FIOM  0x00000001
 #define HENVCFG_LPE   0x00000004
 #define HENVCFG_SSE   0x00000008