diff --git a/src/cpu/core_dyn_x86/risc_x86.h b/src/cpu/core_dyn_x86/risc_x86.h
index ca502d8f..5bf626ee 100644
--- a/src/cpu/core_dyn_x86/risc_x86.h
+++ b/src/cpu/core_dyn_x86/risc_x86.h
@@ -388,7 +388,7 @@ static void gen_dop_byte_imm_mem(DualOps op,DynReg * dr1,Bit8u di1,void* data) {
 	case DOP_AND:	tmp=0x0522; break;
 	case DOP_OR:	tmp=0x050a; break;
 	case DOP_TEST:	tmp=0x0584; goto nochange;	//Doesn't change
-	case DOP_MOV:	tmp=0x0585; break;
+	case DOP_MOV:	tmp=0x058A; break;
 	default:
 		IllegalOption("gen_dop_byte_imm_mem");
 	}