diff --git a/include/acpi/actypes.h b/include/acpi/actypes.h
index 3a451dc..8cd774a2 100644
--- a/include/acpi/actypes.h
+++ b/include/acpi/actypes.h
@@ -243,6 +243,11 @@
 #define ACPI_LOGMODE_PHYSPTR            ACPI_LOGICAL_ADDRESSING  | ACPI_PHYSICAL_POINTER
 #define ACPI_LOGMODE_LOGPTR             ACPI_LOGICAL_ADDRESSING  | ACPI_LOGICAL_POINTER
 
+/* Types for the OS interface layer (OSL) */
+
+#ifdef ACPI_USE_LOCAL_CACHE
+#define acpi_cache_t                struct acpi_memory_list
+#endif
 
 /*
  * Useful defines