diff --git a/target/Config.in b/target/Config.in
index 8ff7bee52..780ee421f 100644
--- a/target/Config.in
+++ b/target/Config.in
@@ -85,6 +85,9 @@ config sparc
 	select BIG_ENDIAN
 	bool
 
+config x86_64
+	bool
+
 config ARCH
 	string
 	default "arm"     if arm
@@ -100,4 +103,5 @@ config ARCH
 	default "sh4"     if sh4
 	default "sh4eb"   if sh4eb
 	default "sparc"   if sparc
+	default "x86_64"  if x86_64
 
diff --git a/target/imagebuilder/Config.in b/target/imagebuilder/Config.in
index 50b582581..1615b60a4 100644
--- a/target/imagebuilder/Config.in
+++ b/target/imagebuilder/Config.in
@@ -2,6 +2,7 @@ config IB
 	bool "Build the OpenWrt Image Builder"
 	depends !TARGET_ROOTFS_INITRAMFS
 	depends !PROFILE_KCONFIG
+	depends !LINUX_2_6_UML
 	default y if ALL
 	help
 	  This is essentially a stripped-down version of the buildroot
diff --git a/target/linux/uml-2.6/Makefile b/target/linux/uml-2.6/Makefile
index 33bf8060f..25624108a 100644
--- a/target/linux/uml-2.6/Makefile
+++ b/target/linux/uml-2.6/Makefile
@@ -5,10 +5,25 @@
 # See /LICENSE for more information.
 #
 include $(TOPDIR)/rules.mk
+include $(INCLUDE_DIR)/host.mk
 
-ARCH:=i386
+# UML only makes sense on linux
+ifeq ($(HOST_OS),Linux)
+
+ARCH:=$(shell uname -m | sed \
+	-e 's/i[3-9]86/i386/' \
+	-e 's/mipsel/mips/' \
+	-e 's/mipseb/mips/' \
+	-e 's/powerpc/ppc/' \
+	-e 's/sh[234]/sh/' \
+	-e 's/armeb/arm/' \
+)
 BOARD:=uml
 BOARDNAME:=User Mode Linux
+FEATURES:=broken
+LINUX_CONFIG:=$(CURDIR)/config/$(ARCH)
 
 include $(INCLUDE_DIR)/kernel-build.mk
+endif
+
 $(eval $(call BuildKernel))
diff --git a/target/linux/uml-2.6/config/default b/target/linux/uml-2.6/config/i386
similarity index 87%
rename from target/linux/uml-2.6/config/default
rename to target/linux/uml-2.6/config/i386
index 53707e406..ddfda832b 100644
--- a/target/linux/uml-2.6/config/default
+++ b/target/linux/uml-2.6/config/i386
@@ -1,7 +1,7 @@
 CONFIG_3_LEVEL_PGTABLES=y
-CONFIG_64BIT=y
-# CONFIG_ARCH_HAS_SC_SIGNALS is not set
-# CONFIG_ARCH_REUSE_HOST_VSYSCALL_AREA is not set
+# CONFIG_64BIT is not set
+CONFIG_ARCH_HAS_SC_SIGNALS=y
+CONFIG_ARCH_REUSE_HOST_VSYSCALL_AREA=y
 # CONFIG_ATM is not set
 CONFIG_BASE_SMALL=0
 CONFIG_BINFMT_MISC=m
@@ -13,9 +13,7 @@ CONFIG_CON_CHAN="xterm"
 CONFIG_CON_ZERO_CHAN="fd:0,fd:1"
 CONFIG_CRAMFS=y
 # CONFIG_CRYPTO_AES_586 is not set
-# CONFIG_CRYPTO_AES_X86_64 is not set
 # CONFIG_CRYPTO_TWOFISH_586 is not set
-# CONFIG_CRYPTO_TWOFISH_X86_64 is not set
 CONFIG_DEFAULT_AS=y
 # CONFIG_DEFAULT_DEADLINE is not set
 CONFIG_DEFAULT_IOSCHED="anticipatory"
@@ -49,7 +47,7 @@ CONFIG_KALLSYMS=y
 CONFIG_KALLSYMS_EXTRA_PASS=y
 CONFIG_KERNEL_STACK_ORDER=2
 CONFIG_LBD=y
-CONFIG_LD_SCRIPT_DYN=y
+CONFIG_LD_SCRIPT_STATIC=y
 CONFIG_LEGACY_PTYS=y
 CONFIG_LEGACY_PTY_COUNT=256
 # CONFIG_M386 is not set
@@ -57,7 +55,7 @@ CONFIG_LEGACY_PTY_COUNT=256
 # CONFIG_M586 is not set
 # CONFIG_M586MMX is not set
 # CONFIG_M586TSC is not set
-CONFIG_M686=y
+# CONFIG_M686 is not set
 # CONFIG_MAC_PARTITION is not set
 CONFIG_MAGIC_SYSRQ=y
 CONFIG_MCONSOLE=y
@@ -73,7 +71,7 @@ CONFIG_MCONSOLE=y
 # CONFIG_MMAPPER is not set
 CONFIG_MODE_SKAS=y
 # CONFIG_MPENTIUM4 is not set
-# CONFIG_MPENTIUMII is not set
+CONFIG_MPENTIUMII=y
 # CONFIG_MPENTIUMIII is not set
 # CONFIG_MPENTIUMM is not set
 # CONFIG_MVIAC3_2 is not set
@@ -104,23 +102,20 @@ CONFIG_QFMT_V2=y
 CONFIG_QUOTA=y
 CONFIG_QUOTACTL=y
 CONFIG_RELAY=y
-CONFIG_RESOURCES_64BIT=y
-CONFIG_RWSEM_GENERIC_SPINLOCK=y
 CONFIG_RWSEM_XCHGADD_ALGORITHM=y
 CONFIG_SEMAPHORE_SLEEPERS=y
-CONFIG_SMP_BROKEN=y
 CONFIG_SOFT_WATCHDOG=m
 # CONFIG_SPARSEMEM_STATIC is not set
 CONFIG_SQUASHFS_EMBEDDED=y
 CONFIG_SSL=y
 CONFIG_SSL_CHAN="pty"
-# CONFIG_STATIC_LINK is not set
+CONFIG_STATIC_LINK=y
 CONFIG_STDERR_CONSOLE=y
 CONFIG_STDIO_CONSOLE=y
-CONFIG_STUB_CODE=0x7fbfffe000
-CONFIG_STUB_DATA=0x7fbffff000
-CONFIG_STUB_START=0x7fbfffe000
-CONFIG_TOP_ADDR=0x80000000
+CONFIG_STUB_CODE=0xbfffe000
+CONFIG_STUB_DATA=0xbffff000
+CONFIG_STUB_START=0xbfffe000
+CONFIG_TOP_ADDR=0xC0000000
 # CONFIG_TRACE_IRQFLAGS_SUPPORT is not set
 CONFIG_TTY_CHAN=y
 CONFIG_UID16=y
@@ -150,7 +145,6 @@ CONFIG_X86_INTEL_USERCOPY=y
 CONFIG_X86_INVLPG=y
 CONFIG_X86_L1_CACHE_SHIFT=7
 CONFIG_X86_POPAD_OK=y
-CONFIG_X86_PPRO_FENCE=y
 CONFIG_X86_TSC=y
 CONFIG_X86_USE_PPRO_CHECKSUM=y
 CONFIG_X86_WP_WORKS_OK=y
diff --git a/target/linux/uml-2.6/config/x86_64 b/target/linux/uml-2.6/config/x86_64
new file mode 100644
index 000000000..12f1a105d
--- /dev/null
+++ b/target/linux/uml-2.6/config/x86_64
@@ -0,0 +1,116 @@
+CONFIG_3_LEVEL_PGTABLES=y
+CONFIG_64BIT=y
+# CONFIG_ARCH_HAS_SC_SIGNALS is not set
+# CONFIG_ARCH_REUSE_HOST_VSYSCALL_AREA is not set
+# CONFIG_ATM is not set
+CONFIG_BASE_SMALL=0
+CONFIG_BINFMT_MISC=m
+CONFIG_BLK_DEV_COW_COMMON=y
+CONFIG_BLK_DEV_UBD=y
+CONFIG_BLK_DEV_UBD_SYNC=y
+# CONFIG_BT is not set
+CONFIG_CON_CHAN="xterm"
+CONFIG_CON_ZERO_CHAN="fd:0,fd:1"
+CONFIG_CRAMFS=y
+# CONFIG_CRYPTO_AES_X86_64 is not set
+# CONFIG_CRYPTO_TWOFISH_X86_64 is not set
+CONFIG_DEFAULT_AS=y
+# CONFIG_DEFAULT_DEADLINE is not set
+CONFIG_DEFAULT_IOSCHED="anticipatory"
+CONFIG_DEFCONFIG_LIST="arch/$ARCH/defconfig"
+CONFIG_DNOTIFY=y
+CONFIG_ELF_CORE=y
+# CONFIG_EMBEDDED is not set
+CONFIG_EXT2_FS=y
+CONFIG_EXT3_FS=y
+CONFIG_FS_POSIX_ACL=y
+# CONFIG_FW_LOADER is not set
+# CONFIG_HAMRADIO is not set
+CONFIG_HOSTAUDIO=m
+CONFIG_HOSTFS=y
+# CONFIG_HPPFS is not set
+# CONFIG_HW_RANDOM is not set
+# CONFIG_IFB is not set
+CONFIG_INITRAMFS_SOURCE=""
+CONFIG_INIT_ENV_ARG_LIMIT=128
+CONFIG_IOSCHED_AS=y
+CONFIG_IOSCHED_CFQ=y
+CONFIG_IRQ_RELEASE_METHOD=y
+CONFIG_ISO9660_FS=y
+CONFIG_JBD=y
+CONFIG_KALLSYMS=y
+CONFIG_KALLSYMS_EXTRA_PASS=y
+CONFIG_KERNEL_STACK_ORDER=2
+CONFIG_LBD=y
+CONFIG_LD_SCRIPT_STATIC=y
+CONFIG_LEGACY_PTYS=y
+CONFIG_LEGACY_PTY_COUNT=256
+# CONFIG_MAC_PARTITION is not set
+CONFIG_MAGIC_SYSRQ=y
+CONFIG_MCONSOLE=y
+# CONFIG_MINI_FO is not set
+# CONFIG_MMAPPER is not set
+CONFIG_MODE_SKAS=y
+CONFIG_NEST_LEVEL=0
+# CONFIG_NET_RADIO is not set
+CONFIG_NET_SCH_CLK_GETTIMEOFDAY=y
+# CONFIG_NET_SCH_CLK_JIFFIES is not set
+CONFIG_NFSD_V2_ACL=y
+CONFIG_NFSD_V3_ACL=y
+# CONFIG_NFSD_V4 is not set
+CONFIG_NFS_ACL_SUPPORT=m
+CONFIG_NFS_V3_ACL=y
+# CONFIG_NFS_V4 is not set
+CONFIG_NLS=y
+# CONFIG_NLS_CODEPAGE_850 is not set
+# CONFIG_NLS_ISO8859_15 is not set
+# CONFIG_NLS_KOI8_R is not set
+# CONFIG_NOCONFIG_CHAN is not set
+CONFIG_NULL_CHAN=y
+CONFIG_PORT_CHAN=y
+CONFIG_POSIX_MQUEUE=y
+CONFIG_PTY_CHAN=y
+CONFIG_QFMT_V1=y
+CONFIG_QFMT_V2=y
+CONFIG_QUOTA=y
+CONFIG_QUOTACTL=y
+CONFIG_RELAY=y
+CONFIG_RESOURCES_64BIT=y
+CONFIG_RWSEM_GENERIC_SPINLOCK=y
+CONFIG_SEMAPHORE_SLEEPERS=y
+CONFIG_SMP_BROKEN=y
+CONFIG_SOFT_WATCHDOG=m
+# CONFIG_SPARSEMEM_STATIC is not set
+CONFIG_SQUASHFS_EMBEDDED=y
+CONFIG_SSL=y
+CONFIG_SSL_CHAN="pty"
+CONFIG_STATIC_LINK=y
+CONFIG_STDERR_CONSOLE=y
+CONFIG_STDIO_CONSOLE=y
+CONFIG_STUB_CODE=0x7fbfffe000
+CONFIG_STUB_DATA=0x7fbffff000
+CONFIG_STUB_START=0x7fbfffe000
+CONFIG_TOP_ADDR=0x80000000
+# CONFIG_TRACE_IRQFLAGS_SUPPORT is not set
+CONFIG_TTY_CHAN=y
+CONFIG_UID16=y
+CONFIG_UML=y
+CONFIG_UML_NET=y
+CONFIG_UML_NET_DAEMON=y
+CONFIG_UML_NET_ETHERTAP=y
+CONFIG_UML_NET_MCAST=y
+# CONFIG_UML_NET_PCAP is not set
+CONFIG_UML_NET_SLIP=y
+CONFIG_UML_NET_SLIRP=y
+CONFIG_UML_NET_TUNTAP=y
+CONFIG_UML_RANDOM=y
+CONFIG_UML_REAL_TIME_CLOCK=y
+CONFIG_UML_SOUND=m
+CONFIG_UML_WATCHDOG=m
+CONFIG_UML_X86=y
+# CONFIG_UNUSED_SYMBOLS is not set
+CONFIG_UNWIND_INFO=y
+CONFIG_VM_EVENT_COUNTERS=y
+CONFIG_XTERM_CHAN=y
+CONFIG_ZISOFS_FS=y
+CONFIG_ZLIB_DEFLATE=m
diff --git a/toolchain/kernel-headers/Makefile b/toolchain/kernel-headers/Makefile
index dbeb144c9..0ef907976 100644
--- a/toolchain/kernel-headers/Makefile
+++ b/toolchain/kernel-headers/Makefile
@@ -33,15 +33,13 @@ define Build/Configure/powerpc
 endef
 
 ifneq (,$(findstring uml,$(BOARD)))
-  KMAKE := $(MAKE) -C $(PKG_BUILD_DIR) \
-		ARCH=i386 \
-		CONFIG_SHELL=$(BASH)
-else
-  KMAKE := $(MAKE) -C $(PKG_BUILD_DIR) \
-		ARCH=$(LINUX_KARCH) \
-		CONFIG_SHELL=$(BASH)
+  LINUX_KARCH:=$(ARCH)
 endif
 
+KMAKE := $(MAKE) -C $(PKG_BUILD_DIR) \
+	ARCH=$(LINUX_KARCH) \
+	CONFIG_SHELL=$(BASH)
+
 define Build/Configure
 	yes '' | $(KMAKE) oldconfig
 	$(KMAKE) include/linux/version.h include/asm