diff --git a/src/didacticNet.cpp b/src/didacticNet.cpp
index 72f2622052c7b322fc26d95d6ad2fe640414a3cd..54dacbcf39745d212d3a932c5b49f58184fa28e7 100644
--- a/src/didacticNet.cpp
+++ b/src/didacticNet.cpp
@@ -16,11 +16,11 @@ didacticPSNet::didacticPSNet(){}
 
 didacticPSNet::~didacticPSNet(){}
 
-didacticPSNet::begin(Stream& _port){
+void didacticPSNet::begin(Stream& _port){
   setStream(_port);
 }
 
-didacticPSNet::begin(Stream& _port, PSNET_CALLBACK_SIGNATURE){
+void didacticPSNet::begin(Stream& _port, PSNET_CALLBACK_SIGNATURE){
   setStream(_port);
   setCallback(callback);
 }