diff --git a/Matlab/xdf/load_xdf.m b/Matlab/xdf/load_xdf.m
index 857a95b..162c532 100644
--- a/Matlab/xdf/load_xdf.m
+++ b/Matlab/xdf/load_xdf.m
@@ -503,7 +503,7 @@
                 segments(r).t_begin = temp(k).time_stamps(range(1));
                 segments(r).t_end = temp(k).time_stamps(range(2));
                 segments(r).duration = segments(r).t_end - segments(r).t_begin;
-                segments(r).effective_srate = segments(r).num_samples / segments(r).duration;
+                segments(r).effective_srate = (segments(r).num_samples-1)/ segments(r).duration;
             end
             
             % calculate the weighted mean sampling rate over all segments