diff --git a/xen/drivers/passthrough/vtd/intremap.c b/xen/drivers/passthrough/vtd/intremap.c
index a0663ecd22..838268d772 100644
--- a/xen/drivers/passthrough/vtd/intremap.c
+++ b/xen/drivers/passthrough/vtd/intremap.c
@@ -893,12 +893,12 @@ int iommu_enable_x2apic_IR(void)
 
         if ( !platform_supports_x2apic() )
             return -ENXIO;
+
+        iommu_ops = intel_iommu_ops;
     }
     else if ( !x2apic_enabled )
         return -EOPNOTSUPP;
 
-    iommu_ops = intel_iommu_ops;
-
     for_each_drhd_unit ( drhd )
     {
         iommu = drhd->iommu;