fix broken citation

diff --git a/doc/txt/tep4.txt b/doc/txt/tep4.txt
index 41366d433bba26416ee299bce705e54526cf044e..2d3c676ba0cdc403e3418035734ca93b234b8fc3 100644 (file)
--- a/doc/txt/tep4.txt
+++ b/doc/txt/tep4.txt
@@ -132,4 +132,6 @@ ID allocation policy.
 7. Citations
 ====================================================================
 
+.. [TEP_1] TEP 1: TEP Structure and Keywords 
+
 .. [1] TEP 116: Packet Protocols