diff --git a/src/slic3r/GUI/SavePresetDialog.hpp b/src/slic3r/GUI/SavePresetDialog.hpp
index 4768decc0..61f069c00 100644
--- a/src/slic3r/GUI/SavePresetDialog.hpp
+++ b/src/slic3r/GUI/SavePresetDialog.hpp
@@ -10,6 +10,7 @@
 class wxString;
 class wxStaticText;
 class wxComboBox;
+class wxRadioBox;
 class wxStaticBitmap;
 
 namespace Slic3r {