diff --git a/gtk/gtkfontbutton.c b/gtk/gtkfontbutton.c
index 9845c58682..3cd42e161c 100644
--- a/gtk/gtkfontbutton.c
+++ b/gtk/gtkfontbutton.c
@@ -1269,6 +1269,7 @@ pango_font_description_to_css (PangoFontDescription *desc,
           g_string_append (s, "font-stretch: expanded; ");
           break;
         case PANGO_STRETCH_EXTRA_EXPANDED:
+          g_string_append (s, "font-stretch: extra-expanded; ");
           break;
         case PANGO_STRETCH_ULTRA_EXPANDED:
           g_string_append (s, "font-stretch: ultra-expanded; ");