diff --git a/src/slic3r/GUI/ParamsPanel.cpp b/src/slic3r/GUI/ParamsPanel.cpp
index 7a6588719a..d4dcff3d91 100644
--- a/src/slic3r/GUI/ParamsPanel.cpp
+++ b/src/slic3r/GUI/ParamsPanel.cpp
@@ -598,13 +598,14 @@ void ParamsPanel::set_active_tab(wxPanel* tab)
         wxString title = cur_tab->type() == Preset::TYPE_FILAMENT ? _L("Filament settings") : _L("Printer settings");
         dialog->SetTitle(title);
     }
+    auto tab_print = dynamic_cast<Tab*>(m_tab_print);
     if (cur_tab == m_tab_print) {
-        if (cur_tab)
-            cur_tab->toggle_line("print_flow_ratio", false);
+        if (tab_print)
+            tab_print->toggle_line("print_flow_ratio", false);
     }
     else {
-        if (cur_tab)
-            cur_tab->toggle_line("print_flow_ratio", false);
+        if (tab_print)
+            tab_print->toggle_line("print_flow_ratio", false);
     }
 }