diff --git a/lib/http.h b/lib/http.h
index 372b670c5..0fb98e108 100644
--- a/lib/http.h
+++ b/lib/http.h
@@ -41,8 +41,11 @@
  * ------------------------------------------------------------
  ****************************************************************************/
 
+/* protocol-specific functions set up to be called by the main engine */
+
 CURLcode http(struct connectdata *conn);
 CURLcode http_done(struct connectdata *conn);
 CURLcode http_connect(struct connectdata *conn);
+CURLcode http_close(struct connectdata *conn);
 
 #endif