diff --git a/doc/private/branches b/doc/private/branches
index 9a7431fcd7..1f484b1d9a 100644
--- a/doc/private/branches
+++ b/doc/private/branches
@@ -58,6 +58,7 @@ rt15562				new
 rt15568				new	
 rt15608				new	
 rt15613				new	
+rt15633				new	
 rt1727				open		// ixfr-from-differences workfile
 rt1727b				open	
 rt1727c				open