diff --git a/src/drivers/navio_adc/navio_adc.cpp b/src/drivers/navio_adc/navio_adc.cpp
index 4467a39dc4..7d2f297b51 100644
--- a/src/drivers/navio_adc/navio_adc.cpp
+++ b/src/drivers/navio_adc/navio_adc.cpp
@@ -81,7 +81,7 @@ public:
 	NavioADC();
 	virtual ~NavioADC();
 
-	virtual int init();
+	virtual int init() override;
 
 	virtual ssize_t devRead(void *buf, size_t count) override;
 	virtual int devIOCTL(unsigned long request, unsigned long arg) override;