diff --git a/libgimpbase/gimpbase.def b/libgimpbase/gimpbase.def
index 2f6975e99f..f191669eb0 100644
--- a/libgimpbase/gimpbase.def
+++ b/libgimpbase/gimpbase.def
@@ -62,6 +62,7 @@ EXPORTS
 	gimp_image_type_get_type
 	gimp_ink_blob_type_get_type
 	gimp_installation_directory
+	gimp_installation_directory_file
 	gimp_interpolation_type_get_type
 	gimp_join_style_get_type
 	gimp_locale_directory