diff --git a/arch/x86/cpu/Makefile b/arch/x86/cpu/Makefile
index 92a9023..e1c84ce 100644
--- a/arch/x86/cpu/Makefile
+++ b/arch/x86/cpu/Makefile
@@ -45,6 +45,7 @@
 obj-$(CONFIG_SMP) += sipi_vector.o
 endif
 obj-y += turbo.o
+obj-$(CONFIG_HAVE_ACPI_RESUME) += wakeup.o
 
 ifeq ($(CONFIG_$(SPL_)X86_64),y)
 obj-y += x86_64/