diff --git a/include/slibtool/slibtool.h b/include/slibtool/slibtool.h
index 0cbcad5..1d4fe74 100644
--- a/include/slibtool/slibtool.h
+++ b/include/slibtool/slibtool.h
@@ -423,6 +423,7 @@ slbt_api int  slbt_output_error_vector  (const struct slbt_driver_ctx *);
 /* archiver utility api */
 slbt_api int  slbt_ar_output_arname     (const struct slbt_archive_ctx *);
 slbt_api int  slbt_ar_output_members    (const struct slbt_archive_meta *);
+slbt_api int  slbt_ar_output_symbols    (const struct slbt_archive_meta *);
 
 /* package info */
 slbt_api const struct slbt_source_version * slbt_source_version(void);