diff --git a/common/widgets/color_swatch.cpp b/common/widgets/color_swatch.cpp
index f24f0a0526..87a29e27db 100644
--- a/common/widgets/color_swatch.cpp
+++ b/common/widgets/color_swatch.cpp
@@ -120,7 +120,8 @@ COLOR_SWATCH::COLOR_SWATCH( wxWindow* aParent, COLOR4D aColor, int aID, COLOR4D
         m_background( aBackground ),
         m_default( aDefault ),
         m_userColors( nullptr ),
-        m_readOnly( false )
+        m_readOnly( false ),
+        m_supportsOpacity( true )
 {
     wxASSERT_MSG( aSwatchSize != SWATCH_EXPAND, "SWATCH_EXPAND not supported in COLOR_SWATCH" );
 
@@ -152,7 +153,8 @@ COLOR_SWATCH::COLOR_SWATCH( wxWindow *aParent, wxWindowID aID, const wxPoint &aP
                             const wxSize &aSize, long aStyle ) :
         wxPanel( aParent, aID, aPos, aSize, aStyle ),
         m_userColors( nullptr ),
-        m_readOnly( false )
+        m_readOnly( false ),
+        m_supportsOpacity( true )
 {
     if( aSize == wxDefaultSize )
         m_size = ConvertDialogToPixels( SWATCH_SIZE_MEDIUM_DU );