diff --git a/src/cmd/nm/doc.go b/src/cmd/nm/doc.go
index 480c1c3dde4..8e88e2e6395 100644
--- a/src/cmd/nm/doc.go
+++ b/src/cmd/nm/doc.go
@@ -17,7 +17,7 @@ This implementation adds the flag -S, which prints each symbol's size
 in decimal after its address.
 
 Usage:
-	go tool nm [-aghnsTu] file
+	go tool nm [-aghnsSTu] file
 
 */
 package main
diff --git a/src/cmd/nm/nm.c b/src/cmd/nm/nm.c
index aa056b88253..b5e1ca0b6b7 100644
--- a/src/cmd/nm/nm.c
+++ b/src/cmd/nm/nm.c
@@ -72,7 +72,7 @@ void	zenter(Sym*);
 void
 usage(void)
 {
-	fprint(2, "usage: nm [-aghnsTu] file ...\n");
+	fprint(2, "usage: nm [-aghnsSTu] file ...\n");
 	exits("usage");
 }