diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index 765f1897814bd469b5d714ed50a1e02439bb7be3..bf4d23e0f76e56b62ad07074847d5738439bf2d2 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -4517,8 +4517,7 @@ int x86_decode_insn(struct x86_emulate_ctxt *ctxt, void *insn, int insn_len)
 
 	/* vex-prefix instructions are not implemented */
 	if (ctxt->opcode_len == 1 && (ctxt->b == 0xc5 || ctxt->b == 0xc4) &&
-	    (mode == X86EMUL_MODE_PROT64 ||
-	    (mode >= X86EMUL_MODE_PROT16 && (ctxt->modrm & 0x80)))) {
+	    (mode == X86EMUL_MODE_PROT64 || (ctxt->modrm & 0xc0) == 0xc0)) {
 		ctxt->d = NotImpl;
 	}