--- a/hgext3rd/evolve/cmdrewrite.py	Mon Mar 12 15:51:34 2018 -0700
+++ b/hgext3rd/evolve/cmdrewrite.py	Mon Mar 12 15:51:43 2018 -0700
@@ -1236,10 +1236,8 @@
 
         if grabstate:
             grabstate.delete()
-        if newnode:
-            compat.createmarkers(repo, [(origctx, (repo[newnode],))])
-        else:
-            compat.createmarkers(repo, [(origctx, (pctx,))])
+        newctx = repo[newnode] if newnode else pctx
+        compat.createmarkers(repo, [(origctx, (newctx,))], operation="grab")
 
         if newnode is None:
             ui.warn(_("note: grab of %d:%s created no changes to commit\n") %