diff --git a/drivers/staging/comedi/drivers/mite.c b/drivers/staging/comedi/drivers/mite.c
index d4f486ac3e22bb19c85b58c0b7f56ee5e231115e..e27850f628ced3a0cca48224f62798421b28de58 100644
--- a/drivers/staging/comedi/drivers/mite.c
+++ b/drivers/staging/comedi/drivers/mite.c
@@ -92,7 +92,7 @@ static void dump_chip_signature(u32 csigr_bits)
 		mite_csigr_wins(csigr_bits), mite_csigr_iowins(csigr_bits));
 }
 
-unsigned mite_fifo_size(struct mite_struct *mite, unsigned channel)
+static unsigned mite_fifo_size(struct mite_struct *mite, unsigned channel)
 {
 	unsigned fcr_bits = readl(mite->mite_io_addr + MITE_FCR(channel));
 	unsigned empty_count = (fcr_bits >> 16) & 0xff;