diff --git a/gui/trunk/CLASSRead.cxx b/gui/trunk/CLASSRead.cxx
index a9d415bcd4ed28b02be1c93801c2d6fa3bc69430..854e1d5b62b6c42bd01db8e1ec265db1e443a453 100755
--- a/gui/trunk/CLASSRead.cxx
+++ b/gui/trunk/CLASSRead.cxx
@@ -1207,7 +1207,7 @@ void CLASSRead::BuildTGraphUsingDecayChain(vector<CLASSPlotElement> toplot, int
 	
 	
 	fData[toplot[0].fTreeId]->GetEntry(StartingStep);
-	vTime.push_back(0);
+	vTime.push_back(1);
 	
 	Xmin = vTime[0];
 	Xmax = vTime[0] + FinalTime/cYear;