diff --git a/internal/catmsg/catmsg.go b/internal/catmsg/catmsg.go
index 74c039f..f8abf37 100644
--- a/internal/catmsg/catmsg.go
+++ b/internal/catmsg/catmsg.go
@@ -294,7 +294,7 @@
 //   d.Arg(1)
 //   d.Render(resultOfInvites)
 //   d.Render(" %[2]v to ")
-//   d.Arg(1)
+//   d.Arg(2)
 //   d.Render(resultOfTheir)
 //   d.Render(" party.")
 // where the messages for "invites" and "their" both use a plural.Select
diff --git a/message/message.go b/message/message.go
index 9279123..187b26f 100644
--- a/message/message.go
+++ b/message/message.go
@@ -150,6 +150,7 @@
 
 // Arg implements catmsg.Renderer.
 func (p *printer) Arg(i int) interface{} { // TODO, also return "ok" bool
+	i--
 	if uint(i) < uint(len(p.args)) {
 		return p.args[i]
 	}
diff --git a/message/print.go b/message/print.go
index c0bef3f..7e4642b 100644
--- a/message/print.go
+++ b/message/print.go
@@ -1040,7 +1040,7 @@
 						p.fmt.plusV = p.fmt.plus
 						p.fmt.plus = false
 					}
-					p.printArg(p.Arg(p.argNum), rune(c))
+					p.printArg(p.Arg(p.argNum+1), rune(c))
 					p.argNum++
 					i++
 					continue formatLoop