diff --git a/gtsam_unstable/gtsam_unstable.h b/gtsam_unstable/gtsam_unstable.h
index 43155e72c..80774e862 100644
--- a/gtsam_unstable/gtsam_unstable.h
+++ b/gtsam_unstable/gtsam_unstable.h
@@ -577,4 +577,22 @@ virtual class DummyFactor : gtsam::NonlinearFactor {
   DummyFactor(size_t key1, size_t dim1, size_t key2, size_t dim2);
 };
 
+#include <gtsam_unstable/slam/InvDepthFactorVariant1.h>
+virtual class InvDepthFactorVariant1 : gtsam::NonlinearFactor {
+  InvDepthFactorVariant1(size_t poseKey, size_t landmarkKey, const gtsam::Point2& measured, const gtsam::Cal3_S2* K, const gtsam::noiseModel::Base* model);
+};
+
+#include <gtsam_unstable/slam/InvDepthFactorVariant2.h>
+virtual class InvDepthFactorVariant2 : gtsam::NonlinearFactor {
+  InvDepthFactorVariant2(size_t poseKey, size_t landmarkKey, const gtsam::Point2& measured, const gtsam::Cal3_S2* K, const gtsam::Point3& referencePoint, const gtsam::noiseModel::Base* model);
+};
+
+#include <gtsam_unstable/slam/InvDepthFactorVariant3.h>
+virtual class InvDepthFactorVariant3a : gtsam::NonlinearFactor {
+  InvDepthFactorVariant3a(size_t poseKey, size_t landmarkKey, const gtsam::Point2& measured, const gtsam::Cal3_S2* K, const gtsam::noiseModel::Base* model);
+};
+virtual class InvDepthFactorVariant3b : gtsam::NonlinearFactor {
+  InvDepthFactorVariant3b(size_t poseKey1, size_t poseKey2, size_t landmarkKey, const gtsam::Point2& measured, const gtsam::Cal3_S2* K, const gtsam::noiseModel::Base* model);
+};
+
 } //\namespace gtsam