diff --git a/tool/create_builddir b/tool/create_builddir
index f328a6b73b..31f7555647 100755
--- a/tool/create_builddir
+++ b/tool/create_builddir
@@ -256,6 +256,7 @@ hw_odroid_xu::
 
 hw_x86_64::
 	@echo "SPECS = genode hw_x86_64" > $(BUILD_DIR)/etc/specs.conf
+	@echo "SPECS += acpi" >> $(BUILD_DIR)/etc/specs.conf
 
 lx_hybrid_x86::
 	@echo "CROSS_DEV_PREFIX =" > $(BUILD_DIR)/etc/tools.conf