diff --git a/hw/tosa.c b/hw/tosa.c
index 64ebaa412b..6702b6b99a 100644
--- a/hw/tosa.c
+++ b/hw/tosa.c
@@ -172,7 +172,7 @@ static void tosa_dac_event(i2c_slave *i2c, enum i2c_event event)
     }
 }
 
-int tosa_dac_recv(i2c_slave *s)
+static int tosa_dac_recv(i2c_slave *s)
 {
     printf("%s: recv not supported!!!\n", __FUNCTION__);
     return -1;