diff --git a/src/io/output_h.f90 b/src/io/output_h.f90
index 55c5ff00..65e1a89f 100644
--- a/src/io/output_h.f90
+++ b/src/io/output_h.f90
@@ -60,7 +60,7 @@ module output_interface
       character(len=kMAX_DIM_LENGTH) :: dimensions(kMAX_DIMENSIONS)
       character(len=kMAX_NAME_LENGTH) :: time_units
       ! global attribute restarted_from
-      ! values: 2000-01-01_00:00:00 or None
+      ! values: 2000-01-01_00:00:00 or "Not Restarted"
       character(len=20) :: restarted_from
 
   contains