diff --git a/src/gtk/bitmap.cpp b/src/gtk/bitmap.cpp
index abef7901a8..17a5c57009 100644
--- a/src/gtk/bitmap.cpp
+++ b/src/gtk/bitmap.cpp
@@ -960,13 +960,11 @@ void wxBitmap::SetMask( wxMask *mask )
     AllocExclusive();
     delete M_BMPDATA->m_mask;
     M_BMPDATA->m_mask = mask;
-#ifndef __WXGTK3__
     if (M_BMPDATA->m_pixbufMask)
     {
         g_object_unref(M_BMPDATA->m_pixbufMask);
         M_BMPDATA->m_pixbufMask = NULL;
     }
-#endif
 }
 
 bool wxBitmap::CopyFromIcon(const wxIcon& icon)