diff --git a/lib/acpi/Makefile b/lib/acpi/Makefile
index 85a1f77..5c2f793 100644
--- a/lib/acpi/Makefile
+++ b/lib/acpi/Makefile
@@ -3,4 +3,5 @@
 
 obj-y += acpigen.o
 obj-y += acpi_device.o
+obj-y += acpi_dp.o
 obj-y += acpi_table.o