diff --git a/matlab/@dynSeries/subsref.m b/matlab/@dynSeries/subsref.m
index a2de5cd6c..2f691926b 100644
--- a/matlab/@dynSeries/subsref.m
+++ b/matlab/@dynSeries/subsref.m
@@ -122,7 +122,7 @@ switch S(1).type
         B.nobs = length(tdx);
         B.vobs = A.vobs;
         B.freq = A.freq;
-        B.init = A.init+tdx(1);
+        B.init = A.init+(tdx(1)-1);
         B.time = A.time(tdx,:);
     elseif isvector(S(1).subs{1}) && all(isint(S(1).subs{1}))
         % Extract a subsample using a vector of integers (observation index).