diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index bb0c0d0..c70d886 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -575,7 +575,7 @@
 	  3 GB of memory. If unsure, say Y.
 
 config IOMMU_HELPER
-	def_bool (CALGARY_IOMMU || GART_IOMMU || SWIOTLB)
+	def_bool (CALGARY_IOMMU || GART_IOMMU || SWIOTLB || AMD_IOMMU)
 config MAXSMP
 	bool "Configure Maximum number of SMP Processors and NUMA Nodes"
 	depends on X86_64 && SMP