diff --git a/pipit/readers/otf2_reader.py b/pipit/readers/otf2_reader.py
index 4c25899..dd781ee 100644
--- a/pipit/readers/otf2_reader.py
+++ b/pipit/readers/otf2_reader.py
@@ -281,6 +281,7 @@ def events_reader(self, rank_size):
 
                         # reset this as a metric event was not read
                         prev_metric_time = -1
+                        metrics_dict = {metric_name: float("nan") for metric_name in metric_names}
 
                         """
                         Below is code to read the primary information about the