diff --git a/wifinina/commandtype_string.go b/wifinina/commandtype_string.go
index ffa15ac..0986047 100644
--- a/wifinina/commandtype_string.go
+++ b/wifinina/commandtype_string.go
@@ -1,3 +1,5 @@
+//go:build wifidebug
+
 // Code generated by "stringer -type=CommandType -trimprefix=Cmd"; DO NOT EDIT.
 
 package wifinina
diff --git a/wifinina/connectionstatus_string.go b/wifinina/connectionstatus_string.go
index 6e159bc..7e7f513 100644
--- a/wifinina/connectionstatus_string.go
+++ b/wifinina/connectionstatus_string.go
@@ -1,3 +1,5 @@
+//go:build wifidebug
+
 // Code generated by "stringer -type=ConnectionStatus -trimprefix=Status"; DO NOT EDIT.
 
 package wifinina
diff --git a/wifinina/encryptiontype_string.go b/wifinina/encryptiontype_string.go
index 9741757..bb3e733 100644
--- a/wifinina/encryptiontype_string.go
+++ b/wifinina/encryptiontype_string.go
@@ -1,3 +1,5 @@
+//go:build wifidebug
+
 // Code generated by "stringer -type=EncryptionType -trimprefix=EncType"; DO NOT EDIT.
 
 package wifinina
diff --git a/wifinina/tcpstate_string.go b/wifinina/tcpstate_string.go
index 3d5bc1f..52b6fc1 100644
--- a/wifinina/tcpstate_string.go
+++ b/wifinina/tcpstate_string.go
@@ -1,3 +1,5 @@
+//go:build wifidebug
+
 // Code generated by "stringer -type=TCPState -trimprefix=TCPState"; DO NOT EDIT.
 
 package wifinina
diff --git a/wifinina/wifinina.go b/wifinina/wifinina.go
index e13a4d8..d0b294c 100644
--- a/wifinina/wifinina.go
+++ b/wifinina/wifinina.go
@@ -164,7 +164,7 @@ func (d *Device) Configure() {
 
 func (d *Device) StartClient(hostname string, addr uint32, port uint16, sock uint8, mode uint8) error {
 	if _debug {
-		fmt.Printf("[StartClient] hostname: %s addr: % 02X, port: %d, sock: %d\r\n", hostname, addr, port, sock)
+		fmt.Printf("[StartClient] hostname: %s addr: %02X, port: %d, sock: %d\r\n", hostname, addr, port, sock)
 	}
 	if err := d.waitForChipSelect(); err != nil {
 		d.spiChipDeselect()