diff --git a/esp3d/bridge.cpp b/esp3d/bridge.cpp
index 8ad4b98e..a8cde28d 100644
--- a/esp3d/bridge.cpp
+++ b/esp3d/bridge.cpp
@@ -127,7 +127,7 @@ void BRIDGE::send2TCP(const __FlashStringHelper *data){
     String tmp = data;
     BRIDGE::send2TCP(tmp.c_str());
 }
-void BRIDGE::send2TCP(String & data){
+void BRIDGE::send2TCP(String data){
     BRIDGE::send2TCP(data.c_str());
 }
 void BRIDGE::send2TCP(const char * data){
diff --git a/esp3d/bridge.h b/esp3d/bridge.h
index 1eaa2eec..6bff0f8f 100644
--- a/esp3d/bridge.h
+++ b/esp3d/bridge.h
@@ -42,7 +42,7 @@ public:
 #ifdef TCP_IP_DATA_FEATURE
     static void processFromTCP2Serial();
     static void send2TCP(const __FlashStringHelper *data);
-    static void send2TCP(String & data);
+    static void send2TCP(String data);
     static void send2TCP(const char * data);
 #endif
 };