diff --git a/doc/play/peano.go b/doc/play/peano.go
index 31619b1b1c..214fe1b613 100644
--- a/doc/play/peano.go
+++ b/doc/play/peano.go
@@ -3,9 +3,9 @@
 // (the nodes are the data).
 // http://en.wikipedia.org/wiki/Peano_axioms
 
-// This program demonstrates the effectiveness
-// of the Go runtime's dynamically growing
-// stacks for heavily recursive computations.
+// This program demonstrates that Go's automatic
+// stack management can handle heavily recursive
+// computations.
 
 package main