diff --git a/drivers/mmc/card/queue.c b/drivers/mmc/card/queue.c
index 45fb362..5196312 100644
--- a/drivers/mmc/card/queue.c
+++ b/drivers/mmc/card/queue.c
@@ -108,7 +108,7 @@
 		wake_up_process(mq->thread);
 }
 
-struct scatterlist *mmc_alloc_sg(int sg_len, int *err)
+static struct scatterlist *mmc_alloc_sg(int sg_len, int *err)
 {
 	struct scatterlist *sg;