diff --git a/gtk/gtkicontheme.c b/gtk/gtkicontheme.c
index 43c3897ded..942f138aa4 100644
--- a/gtk/gtkicontheme.c
+++ b/gtk/gtkicontheme.c
@@ -4568,7 +4568,7 @@ gtk_icon_info_load_symbolic_svg (GtkIconInfo    *icon_info,
                       "     width=\"", width, "\"\n"
                       "     height=\"", height, "\">\n"
                       "  <style type=\"text/css\">\n"
-                      "    rect,path,ellipse,circle {\n"
+                      "    rect,path,ellipse,circle,polygon {\n"
                       "      fill: ", css_fg," !important;\n"
                       "    }\n"
                       "    .warning {\n"