diff --git a/sys/sys/signal.h b/sys/sys/signal.h
index 863b981c2b7..792087f735a 100644
--- a/sys/sys/signal.h
+++ b/sys/sys/signal.h
@@ -307,8 +307,8 @@ struct __siginfo32 {
 #define SEGV_ACCERR	2	/* Invalid permissions for mapped	*/
 				/* object.				*/
 #define	SEGV_PKUERR	100	/* x86: PKU violation			*/
-#define	SEGV_MTEAERR	100	/* arm64: Asynchronous Arm MTE error	*/
-#define	SEGV_MTESERR	101	/* arm64: Synchronous Arm MTE error	*/
+#define	SEGV_MTEAERR	200	/* arm64: Asynchronous Arm MTE error	*/
+#define	SEGV_MTESERR	201	/* arm64: Synchronous Arm MTE error	*/
 
 /* codes for SIGFPE */
 #define FPE_INTOVF	1	/* Integer overflow.			*/