diff --git a/drivers/net/wifi_sim.c b/drivers/net/wifi_sim.c
index d0ba6c022c..f87641cb23 100644
--- a/drivers/net/wifi_sim.c
+++ b/drivers/net/wifi_sim.c
@@ -1119,7 +1119,7 @@ static int wifidriver_get_freq(FAR struct wifi_sim_s *wifidev,
 int wifidriver_set_txpower(FAR struct wifi_sim_s *wifidev,
                            FAR struct iwreq *pwrq)
 {
-  int ret;
+  int ret = OK;
 
   switch (wifidev->mode)
     {