diff --git a/libraries/AP_Radio/AP_Radio_cc2500.h b/libraries/AP_Radio/AP_Radio_cc2500.h
index 2bf51d2097..113ae3b4ab 100644
--- a/libraries/AP_Radio/AP_Radio_cc2500.h
+++ b/libraries/AP_Radio/AP_Radio_cc2500.h
@@ -70,7 +70,7 @@ public:
     const AP_Radio::stats &get_stats(void) override;
 
     // set the 2.4GHz wifi channel used by companion computer, so it can be avoided
-    void set_wifi_channel(uint8_t channel) {
+    void set_wifi_channel(uint8_t channel) override {
         // t_status.wifi_chan = channel;
     }
     
diff --git a/libraries/AP_Radio/AP_Radio_cypress.h b/libraries/AP_Radio/AP_Radio_cypress.h
index 30eac3ab4e..a08fd86bb7 100644
--- a/libraries/AP_Radio/AP_Radio_cypress.h
+++ b/libraries/AP_Radio/AP_Radio_cypress.h
@@ -71,7 +71,7 @@ public:
     const AP_Radio::stats &get_stats(void) override;
 
     // set the 2.4GHz wifi channel used by companion computer, so it can be avoided
-    void set_wifi_channel(uint8_t channel) {
+    void set_wifi_channel(uint8_t channel) override {
         t_status.wifi_chan = channel;
     }