diff --git a/drivers/hid/wacom_wac.c b/drivers/hid/wacom_wac.c
index afa8c9f24a42..6da16a879c9f 100644
--- a/drivers/hid/wacom_wac.c
+++ b/drivers/hid/wacom_wac.c
@@ -2667,7 +2667,7 @@ static void wacom_report_events(struct hid_device *hdev,
 	}
 }
 
-int wacom_wac_collection(struct hid_device *hdev, struct hid_report *report,
+static int wacom_wac_collection(struct hid_device *hdev, struct hid_report *report,
 			 int collection_index, struct hid_field *field,
 			 int field_index)
 {