diff --git a/insns.dat b/insns.dat
index 5bd2e521..3ee7ca9d 100644
--- a/insns.dat
+++ b/insns.dat
@@ -800,7 +800,8 @@ MONITOR		void				[	0f 01 c8]				PRESCOTT
 MONITOR		reg_eax,reg_ecx,reg_edx		[---:	0f 01 c8]				PRESCOTT,NOLONG,ND
 MONITOR		reg_rax,reg_ecx,reg_edx		[---:	0f 01 c8]				X64,ND
 MONITORX	void				[	0f 01 fa]				AMD
-MONITORX	reg_rax,reg_ecx,reg_edx		[---:	0f 01 fa]				AMD,ND
+MONITORX	reg_eax,reg_ecx,reg_edx		[---:	0f 01 fa]				AMD,ND
+MONITORX	reg_ax,reg_ecx,reg_edx		[---:	0f 01 fa]				AMD,ND
 MOV		mem,reg_sreg			[mr:	8c /r]					8086,SW
 MOV		reg16,reg_sreg			[mr:	o16 8c /r]				8086
 MOV		reg32,reg_sreg			[mr:	o32 8c /r]				386