diff --git a/examples/entcpkg/ent/template/stringer.tmpl b/examples/entcpkg/ent/template/stringer.tmpl
index a25a353a1..072b6d52b 100644
--- a/examples/entcpkg/ent/template/stringer.tmpl
+++ b/examples/entcpkg/ent/template/stringer.tmpl
@@ -4,10 +4,10 @@
 
 // GoString implements the fmt.GoStringer interface.
 func ({{ $.Receiver  }} *{{ $.Name }}) GoString() string {
-	json, err := json.MarshalIndent({{ $.Receiver  }}, "", "\t")
+	b, err := json.MarshalIndent({{ $.Receiver  }}, "", "\t")
 	if err != nil {
 		return err.Error()
 	}
-	return string(json)
+	return string(b)
 }
 {{ end }}
diff --git a/examples/entcpkg/ent/user.go b/examples/entcpkg/ent/user.go
index d55cfe5bd..41a9a046a 100644
--- a/examples/entcpkg/ent/user.go
+++ b/examples/entcpkg/ent/user.go
@@ -87,11 +87,11 @@ func (u *User) String() string {
 
 // GoString implements the fmt.GoStringer interface.
 func (u *User) GoString() string {
-	json, err := json.MarshalIndent(u, "", "\t")
+	b, err := json.MarshalIndent(u, "", "\t")
 	if err != nil {
 		return err.Error()
 	}
-	return string(json)
+	return string(b)
 }
 
 // Users is a parsable slice of User.