diff --git a/gtsam/navigation/navigation.i b/gtsam/navigation/navigation.i
index 731cf3807..7bbef9fc5 100644
--- a/gtsam/navigation/navigation.i
+++ b/gtsam/navigation/navigation.i
@@ -216,7 +216,13 @@ virtual class CombinedImuFactor: gtsam::NonlinearFactor {
 #include <gtsam/navigation/AHRSFactor.h>
 class PreintegratedAhrsMeasurements {
   // Standard Constructor
-  PreintegratedAhrsMeasurements(Vector bias, Matrix measuredOmegaCovariance);
+  PreintegratedAhrsMeasurements(const gtsam::PreintegrationParams* params,
+                                const Vector& biasHat);
+  PreintegratedAhrsMeasurements(const gtsam::PreintegrationParams* p,
+                                const Vector& bias_hat, double deltaTij,
+                                const gtsam::Rot3& deltaRij,
+                                const Matrix& delRdelBiasOmega,
+                                const Matrix& preint_meas_cov);
   PreintegratedAhrsMeasurements(const gtsam::PreintegratedAhrsMeasurements& rhs);
 
   // Testable