diff --git a/doc/effective_go.html b/doc/effective_go.html
index f0d0ffa53b..8ce72fc196 100644
--- a/doc/effective_go.html
+++ b/doc/effective_go.html
@@ -2046,7 +2046,7 @@ It's easy to write a function to print the arguments.
 </p>
 <pre>
 func ArgServer() {
-    for i, s := range os.Args {
+    for _, s := range os.Args {
         fmt.Println(s)
     }
 }
@@ -2084,7 +2084,7 @@ to have the right signature.
 <pre>
 // Argument server.
 func ArgServer(w http.ResponseWriter, req *http.Request) {
-    for i, s := range os.Args {
+    for _, s := range os.Args {
         fmt.Fprintln(w, s)
     }
 }
diff --git a/doc/effective_go.tmpl b/doc/effective_go.tmpl
index b9ba469d41..bd19f95d34 100644
--- a/doc/effective_go.tmpl
+++ b/doc/effective_go.tmpl
@@ -1984,7 +1984,7 @@ It's easy to write a function to print the arguments.
 </p>
 <pre>
 func ArgServer() {
-    for i, s := range os.Args {
+    for _, s := range os.Args {
         fmt.Println(s)
     }
 }
@@ -2022,7 +2022,7 @@ to have the right signature.
 <pre>
 // Argument server.
 func ArgServer(w http.ResponseWriter, req *http.Request) {
-    for i, s := range os.Args {
+    for _, s := range os.Args {
         fmt.Fprintln(w, s)
     }
 }