diff --git a/xen/arch/x86/configs/pvshim_defconfig b/xen/arch/x86/configs/pvshim_defconfig
index a8ab1d4337..2ad27f898e 100644
--- a/xen/arch/x86/configs/pvshim_defconfig
+++ b/xen/arch/x86/configs/pvshim_defconfig
@@ -22,5 +22,7 @@ CONFIG_EXPERT=y
 # CONFIG_LIVEPATCH is not set
 # CONFIG_SUPPRESS_DUPLICATE_SYMBOL_WARNINGS is not set
 # CONFIG_TRACEBUFFER is not set
+# CONFIG_AMD_IOMMU is not set
+# CONFIG_INTEL_IOMMU is not set
 # CONFIG_DEBUG is not set
 # CONFIG_GDBSX is not set