diff --git a/mercurial/commands.py b/mercurial/commands.py
index ce9e231265c16a99882ec139ff31d9b941b8a9a0_bWVyY3VyaWFsL2NvbW1hbmRzLnB5..ea0902e3128e1c5fbaa253ffc3e73a50b24cf167_bWVyY3VyaWFsL2NvbW1hbmRzLnB5 100644
--- a/mercurial/commands.py
+++ b/mercurial/commands.py
@@ -4985,6 +4985,8 @@
 
     Returns 0 on success, 1 if no phases were changed or some could not
     be changed.
+
+    (For more information about the phases concept, see :hg:`help phases`.)
     """
     # search for a unique phase argument
     targetphase = None