diff --git a/lib/chibi/string.sld b/lib/chibi/string.sld
index 1f2db0bb..7c2ef28d 100644
--- a/lib/chibi/string.sld
+++ b/lib/chibi/string.sld
@@ -3,7 +3,8 @@
   (export
    string-cursor-start string-cursor-end string-cursor-ref
    string-cursor<? string-cursor<=? string-cursor>? string-cursor>=?
-   string-cursor=? string-null? string-every string-any
+   string-cursor=? string-cursor-next substring-cursor
+   string-null? string-every string-any
    string-join string-split string-count
    string-trim string-trim-left string-trim-right
    string-mismatch string-mismatch-right