diff --git a/gtsam_unstable/slam/LocalOrientedPlane3Factor.h b/gtsam_unstable/slam/LocalOrientedPlane3Factor.h
index 7f71b282b..b4d6185a9 100644
--- a/gtsam_unstable/slam/LocalOrientedPlane3Factor.h
+++ b/gtsam_unstable/slam/LocalOrientedPlane3Factor.h
@@ -43,7 +43,7 @@ public:
   /// Constructor
   LocalOrientedPlane3Factor() {}
 
-  virtual ~LocalOrientedPlane3Factor() {}
+  ~LocalOrientedPlane3Factor() override {}
 
   /** Constructor with measured plane (a,b,c,d) coefficients
    * @param z measured plane (a,b,c,d) coefficients as 4D vector