diff --git a/hgext/releasenotes.py b/hgext/releasenotes.py
--- a/hgext/releasenotes.py
+++ b/hgext/releasenotes.py
@@ -577,6 +577,7 @@
     incoming = parsenotesfromrevisions(repo, sections.names(), revs)
 
     if file_ is None:
+        ui.pager('releasenotes')
         return ui.write(serializenotes(sections, incoming))
 
     try: