diff --git a/drivers/acpi/debugfs.c b/drivers/acpi/debugfs.c
index 6b1919f6bd8212248f8a7399c21f73b1303a254e..68bb305b977f9ce481be8d3e95f90ca67922421b 100644
--- a/drivers/acpi/debugfs.c
+++ b/drivers/acpi/debugfs.c
@@ -7,6 +7,8 @@
 #include <linux/debugfs.h>
 #include <linux/acpi.h>
 
+#include "internal.h"
+
 #define _COMPONENT		ACPI_SYSTEM_COMPONENT
 ACPI_MODULE_NAME("debugfs");
 
diff --git a/drivers/acpi/internal.h b/drivers/acpi/internal.h
index 8c71cb8335c0c210be29f11333784a5100b4b8d2..daf0974d863cfc853e56b205afea9d904814cc8e 100644
--- a/drivers/acpi/internal.h
+++ b/drivers/acpi/internal.h
@@ -67,7 +67,7 @@ void acpi_scan_hotplug_enabled(struct acpi_hotplug_profile *hotplug, bool val);
 
 #ifdef CONFIG_DEBUG_FS
 extern struct dentry *acpi_debugfs_dir;
-int acpi_debugfs_init(void);
+void acpi_debugfs_init(void);
 #else
 static inline void acpi_debugfs_init(void) { return; }
 #endif