diff --git a/lib/acpi/acpi.c b/lib/acpi/acpi.c
index f4d5c1e..596301a 100644
--- a/lib/acpi/acpi.c
+++ b/lib/acpi/acpi.c
@@ -6,11 +6,18 @@
  */
 
 #include <mapmem.h>
+#include <tables_csum.h>
 #include <acpi/acpi_table.h>
 #include <asm/global_data.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
+void acpi_update_checksum(struct acpi_table_header *header)
+{
+	header->checksum = 0;
+	header->checksum = table_compute_checksum(header, header->length);
+}
+
 struct acpi_table_header *acpi_find_table(const char *sig)
 {
 	struct acpi_rsdp *rsdp;