diff --git a/app/widgets/gimppaletteeditor.c b/app/widgets/gimppaletteeditor.c
index 249b53bdf3..2ad4a99efc 100644
--- a/app/widgets/gimppaletteeditor.c
+++ b/app/widgets/gimppaletteeditor.c
@@ -944,6 +944,8 @@ palette_editor_resize (GimpPaletteEditor *editor,
   if (! palette)
     return;
 
+  width = MIN (width, GIMP_VIEWABLE_MAX_PREVIEW_SIZE);
+
   editor->zoom_factor = zoom_factor;
   editor->last_width  = width;
   editor->col_width   = width / (editor->columns + 1) - SPACING;