diff --git a/src/regexp/regexp.go b/src/regexp/regexp.go
index 70ba9d0efe..4e4b41242a 100644
--- a/src/regexp/regexp.go
+++ b/src/regexp/regexp.go
@@ -9,7 +9,7 @@
 // More precisely, it is the syntax accepted by RE2 and described at
 // https://golang.org/s/re2syntax, except for \C.
 // For an overview of the syntax, run
-//   godoc regexp/syntax
+//   go doc regexp/syntax
 //
 // The regexp implementation provided by this package is
 // guaranteed to run in time linear in the size of the input.