diff --git a/xen/arch/x86/hvm/emulate.c b/xen/arch/x86/hvm/emulate.c
index 3a7976729b..41f2d0c7e1 100644
--- a/xen/arch/x86/hvm/emulate.c
+++ b/xen/arch/x86/hvm/emulate.c
@@ -308,6 +308,7 @@ static int hvmemul_do_io(
     switch ( rc )
     {
     case X86EMUL_OKAY:
+    case X86EMUL_RETRY:
         vio->req.state = STATE_IOREQ_NONE;
         break;
     case X86EMUL_UNHANDLEABLE: