diff --git a/src/slic3r/GUI/PresetComboBoxes.hpp b/src/slic3r/GUI/PresetComboBoxes.hpp
index f31b67fbe6..7f51f775ee 100644
--- a/src/slic3r/GUI/PresetComboBoxes.hpp
+++ b/src/slic3r/GUI/PresetComboBoxes.hpp
@@ -15,6 +15,7 @@ class ScalableButton;
 class wxBoxSizer;
 class wxComboBox;
 class wxStaticBitmap;
+class wxRadioBox;
 
 namespace Slic3r {