diff --git a/mercurial/commands.py b/mercurial/commands.py
--- a/mercurial/commands.py
+++ b/mercurial/commands.py
@@ -3889,6 +3889,10 @@ def graft(ui, repo, *revs, **opts):
         return _dograft(ui, repo, *revs, **opts)
 
 def _dograft(ui, repo, *revs, **opts):
+    if revs and opts['rev']:
+        ui.warn(_('warning: inconsistent use of --rev might give unexpected '
+                  'revision ordering!\n'))
+
     revs = list(revs)
     revs.extend(opts['rev'])
 
diff --git a/tests/test-graft.t b/tests/test-graft.t
--- a/tests/test-graft.t
+++ b/tests/test-graft.t
@@ -62,6 +62,7 @@ Specify revisions with -r:
   [255]
 
   $ hg graft -r 1 2
+  warning: inconsistent use of --rev might give unexpected revision ordering!
   skipping ancestor revision 2:5c095ad7e90f
   skipping ancestor revision 1:5d205f8b35b6
   [255]