diff --git a/include/acpi/acglobal.h b/include/acpi/acglobal.h
index 734cc77..f9eb592 100644
--- a/include/acpi/acglobal.h
+++ b/include/acpi/acglobal.h
@@ -203,6 +203,7 @@
 
 /* Object caches */
 
+ACPI_EXTERN acpi_cache_t *acpi_gbl_namespace_cache;
 ACPI_EXTERN acpi_cache_t *acpi_gbl_state_cache;
 ACPI_EXTERN acpi_cache_t *acpi_gbl_ps_node_cache;
 ACPI_EXTERN acpi_cache_t *acpi_gbl_ps_node_ext_cache;