diff --git a/src/cmd/godoc/doc.go b/src/cmd/godoc/doc.go
index 701b0e177ca..866cff308fd 100644
--- a/src/cmd/godoc/doc.go
+++ b/src/cmd/godoc/doc.go
@@ -23,6 +23,8 @@ Usage:
 The flags are:
 	-v
 		verbose mode
+	-src
+		print exported source in command-line mode
 	-tabwidth=4
 		width of tabs in units of spaces
 	-path=""
diff --git a/src/cmd/godoc/main.go b/src/cmd/godoc/main.go
index 9f92c6cffcd..5436088f745 100644
--- a/src/cmd/godoc/main.go
+++ b/src/cmd/godoc/main.go
@@ -48,7 +48,7 @@ var (
 
 	// layout control
 	html   = flag.Bool("html", false, "print HTML in command-line mode")
-	genAST = flag.Bool("x", false, "print exported source in command-line mode")
+	genAST = flag.Bool("src", false, "print exported source in command-line mode")
 )