diff --git a/src/northbridge/intel/i945/northbridge.c b/src/northbridge/intel/i945/northbridge.c
index dfe4fe7..a10bb4a 100644
--- a/src/northbridge/intel/i945/northbridge.c
+++ b/src/northbridge/intel/i945/northbridge.c
@@ -29,6 +29,7 @@
 #include <bitops.h>
 #include <cpu/cpu.h>
 #include <boot/tables.h>
+#include <arch/acpi.h>
 #include "chip.h"
 #include "i945.h"
 
@@ -252,8 +253,6 @@
 }
 
 #if CONFIG_HAVE_ACPI_RESUME
-extern u8 acpi_slp_type;
-
 static void northbridge_init(struct device *dev)
 {
 	switch (pci_read_config32(dev, SKPAD)) {