diff --git a/libraries/AP_Proximity/AP_Proximity.h b/libraries/AP_Proximity/AP_Proximity.h
index a45d0a160f..bad3a04f59 100644
--- a/libraries/AP_Proximity/AP_Proximity.h
+++ b/libraries/AP_Proximity/AP_Proximity.h
@@ -54,7 +54,7 @@ public:
 #endif
     };
 
-    enum Status {
+    enum class Status {
         NotConnected = 0,
         NoData,
         Good