diff --git a/libgimpwidgets/gimpwidgets.def b/libgimpwidgets/gimpwidgets.def
index 00f97a0dbc..8c25214f37 100644
--- a/libgimpwidgets/gimpwidgets.def
+++ b/libgimpwidgets/gimpwidgets.def
@@ -37,6 +37,7 @@ EXPORTS
 	gimp_color_area_set_color
 	gimp_color_area_set_color_config
 	gimp_color_area_set_draw_border
+	gimp_color_area_set_out_of_gamut
 	gimp_color_area_set_type
 	gimp_color_area_type_get_type
 	gimp_color_button_get_color