diff --git a/tools/lammps-gui/chartviewer.cpp b/tools/lammps-gui/chartviewer.cpp
index 2bbe029ebf..daed3b2b4e 100644
--- a/tools/lammps-gui/chartviewer.cpp
+++ b/tools/lammps-gui/chartviewer.cpp
@@ -147,7 +147,7 @@ void ChartWindow::quit()
 
 void ChartWindow::reset_zoom()
 {
-    int choice = columns->currentData().toInt();
+    int choice = columns->currentData().toInt() - 1;
     if ((choice >= 0) && (choice < charts.size())) charts[choice]->reset_zoom();
 }