diff --git a/SampleProjects/TestSomething/test/ethernet.cpp b/SampleProjects/TestSomething/test/ethernet.cpp
index 7ace2c22..13395e55 100644
--- a/SampleProjects/TestSomething/test/ethernet.cpp
+++ b/SampleProjects/TestSomething/test/ethernet.cpp
@@ -3201,6 +3201,7 @@ uint8_t EthernetClass::socketBeginMulticast(unsigned char, IPAddress,
                                             unsigned short) {
   return 0;
 }
+void EthernetClass::socketPortRand(unsigned short) {}
 
 // ======================== tests ====================================