diff --git a/gtsam/sfm/sfm.i b/gtsam/sfm/sfm.i
index 0a61874c1..19e21b10c 100644
--- a/gtsam/sfm/sfm.i
+++ b/gtsam/sfm/sfm.i
@@ -96,6 +96,13 @@ class BinaryMeasurementsUnit3 {
   void push_back(const gtsam::BinaryMeasurement<gtsam::Unit3>& measurement);
 };
 
+class BinaryMeasurementsRot3 {
+  BinaryMeasurementsRot3();
+  size_t size() const;
+  gtsam::BinaryMeasurement<gtsam::Rot3> at(size_t idx) const;
+  void push_back(const gtsam::BinaryMeasurement<gtsam::Rot3>& measurement);
+};
+
 #include <gtsam/sfm/ShonanAveraging.h>
 
 // TODO(frank): copy/pasta below until we have integer template paremeters in