diff --git a/README.md b/README.md
index 770d5c9..2f3786e 100644
--- a/README.md
+++ b/README.md
@@ -121,7 +121,7 @@ func main() {
 	pool, _ := ants.NewPoolWithFunc(100, func(payload interface{}) {
 		request, ok := payload.(Request)
 		if !ok {
-			request = Request{Result: make(chan []byte)}
+			request = Request{Param:[]byte(""), Result: make(chan []byte)}
 		}
 		reverseParam := func(s []byte) []byte {
 			for i, j := 0, len(s)-1; i < j; i, j = i+1, j-1 {
diff --git a/README_ZH.md b/README_ZH.md
index 2fd8884..871dd34 100644
--- a/README_ZH.md
+++ b/README_ZH.md
@@ -120,7 +120,7 @@ func main() {
 	pool, _ := ants.NewPoolWithFunc(100, func(payload interface{}) {
 		request, ok := payload.(Request)
 		if !ok {
-			request = Request{Result: make(chan []byte)}
+			request = Request{Param:[]byte(""), Result: make(chan []byte)}
 		}
 		reverseParam := func(s []byte) []byte {
 			for i, j := 0, len(s)-1; i < j; i, j = i+1, j-1 {
diff --git a/examples/http.go b/examples/http.go
index 62b728a..56350c7 100644
--- a/examples/http.go
+++ b/examples/http.go
@@ -16,7 +16,7 @@ func main() {
 	pool, _ := ants.NewPoolWithFunc(100, func(payload interface{}) {
 		request, ok := payload.(Request)
 		if !ok {
-			request = Request{Result: make(chan []byte)}
+			request = Request{Param:[]byte(""), Result: make(chan []byte)}
 		}
 		reverseParam := func(s []byte) []byte {
 			for i, j := 0, len(s)-1; i < j; i, j = i+1, j-1 {