diff --git a/debian.master/config/config.common.ubuntu b/debian.master/config/config.common.ubuntu
index 473591a..6517159 100644
--- a/debian.master/config/config.common.ubuntu
+++ b/debian.master/config/config.common.ubuntu
@@ -193,7 +193,7 @@ CONFIG_ALTIVEC=y
 CONFIG_AMD8111_ETH=m
 CONFIG_AMD_IOMMU=y
 CONFIG_AMD_IOMMU_STATS=y
-# CONFIG_AMD_IOMMU_V2 is not set
+CONFIG_AMD_IOMMU_V2=m
 CONFIG_AMD_NB=y
 CONFIG_AMD_NUMA=y
 CONFIG_AMD_PHY=y