diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 55d3c8b8b35b37037fa1567983d050295c9a8a21..2d83b8c7596567a020300d8dd1aeefeb33a6a055 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -4910,7 +4910,7 @@ void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
  *	LOCKING:
  *	spin_lock_irqsave(host lock)
  */
-void ata_sg_clean(struct ata_queued_cmd *qc)
+static void ata_sg_clean(struct ata_queued_cmd *qc)
 {
 	struct ata_port *ap = qc->ap;
 	struct scatterlist *sg = qc->sg;