diff --git a/libgimpcolor/gimpcolor.def b/libgimpcolor/gimpcolor.def
index e4370d741f..f5d6c01a25 100644
--- a/libgimpcolor/gimpcolor.def
+++ b/libgimpcolor/gimpcolor.def
@@ -11,6 +11,7 @@ EXPORTS
 	gimp_cmyk_get_uchar
 	gimp_cmyk_set
 	gimp_cmyk_set_uchar
+	gimp_cmyk_to_rgb
 	gimp_cmyka_get_uchar
 	gimp_cmyka_set
 	gimp_cmyka_set_uchar