diff --git a/docs/io_ref.md b/docs/io_ref.md
index 78f184e..203b653 100644
--- a/docs/io_ref.md
+++ b/docs/io_ref.md
@@ -342,3 +342,5 @@ Example POSIX-only header include:
 * `fseek`, `ftell`, `rewind` — positioning
 * `feof`, `ferror`, `clearerr`, `perror` — error handling
 * `tmpfile`, `tmpnam` — temporary files
+
+[Back to Top](#c99-terminal-io-reference)