diff --git a/src/PHONON/dynamical_matrix.cpp b/src/PHONON/dynamical_matrix.cpp
index 61734bcc82..d866b4e306 100644
--- a/src/PHONON/dynamical_matrix.cpp
+++ b/src/PHONON/dynamical_matrix.cpp
@@ -13,7 +13,7 @@
    ----------------------------------------------------------------------- */
 
 //
-// Created by charlie sievers on 6/21/18.
+// Contributing author: Charlie Sievers, UC Davis (charliesievers at cox.net)
 //
 
 #include "dynamical_matrix.h"
diff --git a/src/PHONON/third_order.cpp b/src/PHONON/third_order.cpp
index 69f5e5c930..ca69113b7d 100644
--- a/src/PHONON/third_order.cpp
+++ b/src/PHONON/third_order.cpp
@@ -13,7 +13,7 @@
    ----------------------------------------------------------------------- */
 
 //
-// Created by charlie sievers on 7/5/18.
+// Contributing author: Charlie Sievers, UC Davis (charliesievers at cox.net)
 //
 
 #include "third_order.h"