diff --git a/drivers/telephony/ixj.c b/drivers/telephony/ixj.c
index 5578a9dd04e80bcffb92e1119c82bb4aa5ce174b..f6b2948ab28856dad684763d2e9e4c52102bf54e 100644
--- a/drivers/telephony/ixj.c
+++ b/drivers/telephony/ixj.c
@@ -5712,7 +5712,7 @@ static int ixj_daa_write(IXJ *j)
 	return 1;
 }
 
-int ixj_set_tone_off(unsigned short arg, IXJ *j)
+static int ixj_set_tone_off(unsigned short arg, IXJ *j)
 {
 	j->tone_off_time = arg;
 	if (ixj_WriteDSPCommand(0x6E05, j))		/* Set Tone Off Period */