diff --git a/templates/normal/experiment.cpp b/templates/normal/experiment.cpp
index dd1d569..c193453 100644
--- a/templates/normal/experiment.cpp
+++ b/templates/normal/experiment.cpp
@@ -34,8 +34,8 @@ auto calculate_hyperperiod() -> long long
 }
 
 struct timestamps {
-    cpp_time_base::duration start;
-    cpp_time_base::duration end;
+    cpp_time_base start;
+    cpp_time_base end;
     int core_id = 0;
 };