diff --git a/mach/arm/thread_status.h b/mach/arm/thread_status.h
index 69f9f4f..cc66a92 100755
--- a/mach/arm/thread_status.h
+++ b/mach/arm/thread_status.h
@@ -2,6 +2,7 @@
 #define _MACH_ARM_THREAD_STATUS_H_

 #define ARM_THREAD_STATE        1
+#define THREAD_STATE_NONE       2

 typedef struct arm_thread_state {
        unsigned int r0;