diff --git a/examples/json/json.go b/examples/json/json.go
index 6a1f56d..101a1cb 100644
--- a/examples/json/json.go
+++ b/examples/json/json.go
@@ -14,6 +14,8 @@ type response1 struct {
     Page   int
     Fruits []string
 }
+// Fields must have capital letters to be exposed to other
+// programs such as the JSON Marshaller. 
 type response2 struct {
     Page   int      `json:"page"`
     Fruits []string `json:"fruits"`