diff --git a/gtsam/geometry/Point3.h b/gtsam/geometry/Point3.h
index b425af8a4..57188fc5e 100644
--- a/gtsam/geometry/Point3.h
+++ b/gtsam/geometry/Point3.h
@@ -68,7 +68,7 @@ GTSAM_EXPORT Point3 mean(const CONTAINER& points) {
   return sum / points.size();
 }
 
-/// mean of Point3 pair
+/// Calculate the two means of a set of Point3 pairs
 GTSAM_EXPORT Point3Pair means(const std::vector<Point3Pair> &abPointPairs);
 
 template <typename A1, typename A2>