diff --git a/gtsam/geometry/Similarity3.cpp b/gtsam/geometry/Similarity3.cpp
index c426fef09..4e8d6e6b7 100644
--- a/gtsam/geometry/Similarity3.cpp
+++ b/gtsam/geometry/Similarity3.cpp
@@ -13,6 +13,7 @@
  * @file   Similarity3.cpp
  * @brief  Implementation of Similarity3 transform
  * @author Paul Drews
+ * @author John Lambert
  */
 
 #include <gtsam/geometry/Similarity3.h>
diff --git a/gtsam/geometry/Similarity3.h b/gtsam/geometry/Similarity3.h
index ccea0c33b..780301c1b 100644
--- a/gtsam/geometry/Similarity3.h
+++ b/gtsam/geometry/Similarity3.h
@@ -13,6 +13,7 @@
  * @file   Similarity3.h
  * @brief  Implementation of Similarity3 transform
  * @author Paul Drews
+ * @author John Lambert
  */
 
 #pragma once