diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index 39748bb3a5430111b8cf4723462eb837137b0213..7a327b24df954ccdf2a0c56f4ac1442a1c799780 100644
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -543,7 +543,7 @@ static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN];
 
 acpi_status
 acpi_os_predefined_override(const struct acpi_predefined_names *init_val,
-			    acpi_string * new_val)
+			    char **new_val)
 {
 	if (!init_val || !new_val)
 		return AE_BAD_PARAMETER;
diff --git a/include/acpi/acpiosxf.h b/include/acpi/acpiosxf.h
index 0bc78df66d4b10764c464986dd9262f69844f94d..d02df0a49d98089d4e6e5c7c3bfb4ad0445ffde1 100644
--- a/include/acpi/acpiosxf.h
+++ b/include/acpi/acpiosxf.h
@@ -95,7 +95,7 @@ acpi_physical_address acpi_os_get_root_pointer(void);
 #ifndef ACPI_USE_ALTERNATE_PROTOTYPE_acpi_os_predefined_override
 acpi_status
 acpi_os_predefined_override(const struct acpi_predefined_names *init_val,
-			    acpi_string * new_val);
+			    char **new_val);
 #endif
 
 #ifndef ACPI_USE_ALTERNATE_PROTOTYPE_acpi_os_table_override