diff --git a/drivers/pnp/base.h b/drivers/pnp/base.h
index e3fa9a2..9fd7bb9 100644
--- a/drivers/pnp/base.h
+++ b/drivers/pnp/base.h
@@ -19,7 +19,6 @@ struct pnp_id *pnp_add_id(struct pnp_dev *dev, char *id);
 int pnp_interface_attach_device(struct pnp_dev *dev);
 
 int pnp_add_card(struct pnp_card *card);
-struct pnp_id *pnp_add_card_id(struct pnp_card *card, char *id);
 void pnp_remove_card(struct pnp_card *card);
 int pnp_add_card_device(struct pnp_card *card, struct pnp_dev *dev);
 void pnp_remove_card_device(struct pnp_dev *dev);
diff --git a/drivers/pnp/card.c b/drivers/pnp/card.c
index b00ef10..e75b060 100644
--- a/drivers/pnp/card.c
+++ b/drivers/pnp/card.c
@@ -102,7 +102,7 @@ static int card_probe(struct pnp_card *card, struct pnp_card_driver *drv)
  * @id: pointer to a pnp_id structure
  * @card: pointer to the desired card
  */
-struct pnp_id *pnp_add_card_id(struct pnp_card *card, char *id)
+static struct pnp_id *pnp_add_card_id(struct pnp_card *card, char *id)
 {
 	struct pnp_id *dev_id, *ptr;