diff --git a/gtsam/geometry/Point3.h b/gtsam/geometry/Point3.h
index 0fa53b1b2..d5c32816e 100644
--- a/gtsam/geometry/Point3.h
+++ b/gtsam/geometry/Point3.h
@@ -61,9 +61,9 @@ GTSAM_EXPORT Point3 cross(const Point3& p, const Point3& q,
                           OptionalJacobian<3, 3> H_q = {});
 
 /// double cross product @return p x (p x q)
-Point3 doubleCross(const Point3& p, const Point3& q,
-                   OptionalJacobian<3, 3> H1 = {},
-                   OptionalJacobian<3, 3> H2 = {});
+GTSAM_EXPORT Point3 doubleCross(const Point3& p, const Point3& q,
+                                OptionalJacobian<3, 3> H1 = {},
+                                OptionalJacobian<3, 3> H2 = {});
 
 /// dot product
 GTSAM_EXPORT double dot(const Point3& p, const Point3& q,