diff --git a/src/sensor_base.h b/src/sensor_base.h
index efef72085f5f21583518535a98c782c0fcedb5cd..354e1474f4919dfa4d1c921b673d6ddf6bb2d999 100644
--- a/src/sensor_base.h
+++ b/src/sensor_base.h
@@ -136,6 +136,7 @@ class SensorBase : public NodeBase, public std::enable_shared_from_this<SensorBa
         void unfixExtrinsics();
         void fixIntrinsics();
         void unfixIntrinsics();
+        void addFeaturePrior();
 
         SizeEigen getCalibSize() const;
         Eigen::VectorXs getCalibration() const;