diff --git a/arch/x86/um/Kconfig b/arch/x86/um/Kconfig
index 186f13268401..dc56c608ce69 100644
--- a/arch/x86/um/Kconfig
+++ b/arch/x86/um/Kconfig
@@ -10,6 +10,7 @@ config UML_X86
 	def_bool y
 	select ARCH_BINFMT_ELF_EXTRA_PHDRS if X86_32
 	select DCACHE_WORD_ACCESS
+	select HAVE_EFFICIENT_UNALIGNED_ACCESS
 
 config 64BIT
 	bool "64-bit kernel" if "$(SUBARCH)" = "x86"