diff --git a/[refs] b/[refs]
index 516ce54cd6e6..ca04433bfc65 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 54b4cbd26987f84791d6e05863a715ded9f7b3a5
+refs/heads/master: 24d2ba0a8a5816eb8322836271fbcb045d915dfd
diff --git a/trunk/arch/x86/Kconfig b/trunk/arch/x86/Kconfig
index 5a82f18ab5ed..62a2820297b1 100644
--- a/trunk/arch/x86/Kconfig
+++ b/trunk/arch/x86/Kconfig
@@ -552,7 +552,7 @@ config CALGARY_IOMMU_ENABLED_BY_DEFAULT
 config AMD_IOMMU
 	bool "AMD IOMMU support"
 	select SWIOTL
-	depends on X86_64 && PCI
+	depends on X86_64 && PCI && ACPI
 	help
 	  Select this to get support for AMD IOMMU hardware in your system.