diff --git a/include/rcp.h b/include/rcp.h
index 896af56..66b7f48 100644
--- a/include/rcp.h
+++ b/include/rcp.h
@@ -28,6 +28,9 @@
 
 /**
  * Reference-counting pointer.
+ *
+ * See https://github.com/holtrop/rcp for documentation, issues, and pull
+ * requests.
  */
 template <typename T>
 class rcp