diff --git a/hist/hist/src/TAxis.cxx b/hist/hist/src/TAxis.cxx
index 5b6c0ae65dff9..a4fcbadaa9100 100644
--- a/hist/hist/src/TAxis.cxx
+++ b/hist/hist/src/TAxis.cxx
@@ -1268,7 +1268,7 @@ void TAxis::UnZoom()
 
    //unzoom object owning this axis
    SetRange(0,0);
-   TH1 *hobj1 = (TH1*)GetParent();
+   TH1 *hobj1 = dynamic_cast<TH1 *>(GetParent());
    if (!strstr(GetName(),"xaxis")) {
       if (!hobj1) return;
       if (hobj1->GetDimension() == 2) {
@@ -1283,7 +1283,7 @@ void TAxis::UnZoom()
          hobj1->SetMinimum(fXmin);
          hobj1->SetMaximum(fXmax);
       } else {
-         if (fXmin==hobj1->GetMinimum() && fXmax==hobj1->GetMaximum()) {
+         if (fXmin == hobj1->GetMinimumStored() && fXmax == hobj1->GetMaximumStored()) {
             hobj1->SetMinimum(fXmin);
             hobj1->SetMaximum(fXmax);
          } else {