diff --git a/drivers/gpu/drm/radeon/radeon_acpi.c b/drivers/gpu/drm/radeon/radeon_acpi.c
index 6efbd65c929e..8d3251a10cd4 100644
--- a/drivers/gpu/drm/radeon/radeon_acpi.c
+++ b/drivers/gpu/drm/radeon/radeon_acpi.c
@@ -351,7 +351,7 @@ out:
  * handles it.
  * Returns NOTIFY code
  */
-int radeon_atif_handler(struct radeon_device *rdev,
+static int radeon_atif_handler(struct radeon_device *rdev,
 		struct acpi_bus_event *event)
 {
 	struct radeon_atif *atif = &rdev->atif;
diff --git a/drivers/gpu/drm/radeon/radeon_acpi.h b/drivers/gpu/drm/radeon/radeon_acpi.h
index 7af1977c2c68..35202a453e66 100644
--- a/drivers/gpu/drm/radeon/radeon_acpi.h
+++ b/drivers/gpu/drm/radeon/radeon_acpi.h
@@ -27,9 +27,6 @@
 struct radeon_device;
 struct acpi_bus_event;
 
-int radeon_atif_handler(struct radeon_device *rdev,
-		struct acpi_bus_event *event);
-
 /* AMD hw uses four ACPI control methods:
  * 1. ATIF
  * ARG0: (ACPI_INTEGER) function code