diff --git a/BasiliskII/src/uae_cpu/compiler/codegen_x86.h b/BasiliskII/src/uae_cpu/compiler/codegen_x86.h
index d90ae26a..dc8ba01c 100644
--- a/BasiliskII/src/uae_cpu/compiler/codegen_x86.h
+++ b/BasiliskII/src/uae_cpu/compiler/codegen_x86.h
@@ -1053,7 +1053,7 @@ enum {
 
 /*									_format		Opcd		,Mod ,r	    ,m		,mem=dsp+sib	,imm... */
 
-#define MOVBrr(RS, RD)			(_REXBrr(RS, RD),		_O_Mrm		(0x80		,_b11,_r1(RS),_r1(RD)				))
+#define MOVBrr(RS, RD)			(_REXBrr(RS, RD),		_O_Mrm		(0x88		,_b11,_r1(RS),_r1(RD)				))
 #define MOVBmr(MD, MB, MI, MS, RD)	(_REXBmr(MB, MI, RD),		_O_r_X		(0x8a		     ,_r1(RD)		,MD,MB,MI,MS		))
 #define MOVBrm(RS, MD, MB, MI, MS)	(_REXBrm(RS, MB, MI),		_O_r_X		(0x88		     ,_r1(RS)		,MD,MB,MI,MS		))
 #define MOVBir(IM,  R)			(_REXBrr(0, R),			_Or_B		(0xb0,_r1(R)						,_su8(IM)))