diff --git a/lcl/interfaces/gtk/gtkwscustomlistview.inc b/lcl/interfaces/gtk/gtkwscustomlistview.inc
index d1bcb45e96..ba103213c7 100644
--- a/lcl/interfaces/gtk/gtkwscustomlistview.inc
+++ b/lcl/interfaces/gtk/gtkwscustomlistview.inc
@@ -689,8 +689,8 @@ begin
           end;
         gbPixbuf:
           begin
-            Pixmap := gdk_pixmap_new(nil, ImageBitmap.Width, ImageBitmap.Height, 24);
-            Mask := gdk_pixmap_new(nil, ImageBitmap.Width, ImageBitmap.Height, 1);
+            Pixmap := nil;
+            Mask := nil;
             gdk_pixbuf_render_pixmap_and_mask(PGDIObject(ImageBitmap.Handle)^.GDIPixbufObject, pixmap, mask, $80);
           end;
       end;