diff --git a/gtsam/geometry/geometry.i b/gtsam/geometry/geometry.i
index 988727b98..3919af496 100644
--- a/gtsam/geometry/geometry.i
+++ b/gtsam/geometry/geometry.i
@@ -329,6 +329,7 @@ class Rot3 {
 
   // Operator Overloads
   gtsam::Rot3 operator*(const gtsam::Rot3& p2) const;
+  gtsam::Rot3 operator*(const gtsam::Unit3& p) const;
 
   // Manifold
   // gtsam::Rot3 retractCayley(Vector v) const; // TODO, does not exist in both