diff --git a/src/gtk/colordlg.cpp b/src/gtk/colordlg.cpp
index 9a1603649e..8397fa2c87 100644
--- a/src/gtk/colordlg.cpp
+++ b/src/gtk/colordlg.cpp
@@ -65,6 +65,7 @@ bool wxColourDialog::Create(wxWindow *parent, wxColourData *data)
         gtk_color_selection_dialog_get_color_selection(
         GTK_COLOR_SELECTION_DIALOG(m_widget)));
     gtk_color_selection_set_has_palette(sel, true);
+    gtk_color_selection_set_has_opacity_control(sel, m_data.GetChooseAlpha());
 
     return true;
 }