diff --git a/src/gui/BrowserDialog.cxx b/src/gui/BrowserDialog.cxx
index 0fa688d08..01e2fbcb3 100644
--- a/src/gui/BrowserDialog.cxx
+++ b/src/gui/BrowserDialog.cxx
@@ -119,7 +119,7 @@ void BrowserDialog::show(GuiObject* parent, const GUI::Font& font,
 {
   uInt32 w = 0, h = 0;
 
-  const auto* parentDialog = static_cast<Dialog*>(parent);
+  const auto* parentDialog = dynamic_cast<Dialog*>(parent);
   if (parentDialog) {
     parentDialog->getDynamicBounds(w, h);
   } else {