diff --git a/cmd/golangorg/doc.go b/cmd/golangorg/doc.go
index 742507e..469fb82 100644
--- a/cmd/golangorg/doc.go
+++ b/cmd/golangorg/doc.go
@@ -82,7 +82,8 @@
 
 	all	show documentation for all declarations, not just the exported ones
 	methods	show all embedded methods, not just those of unexported anonymous fields
-	src	show the original source code rather then the extracted documentation
+	src	show the original source code rather than the extracted documentation
+	flat	present flat (not indented) directory listings using full paths
 
 For instance, https://golang.org/pkg/math/big/?m=all shows the documentation
 for all (not just the exported) declarations of package big.