diff --git a/testApp/remote/testGetPerformance.cpp b/testApp/remote/testGetPerformance.cpp
index 6f5735f..ae12502 100644
--- a/testApp/remote/testGetPerformance.cpp
+++ b/testApp/remote/testGetPerformance.cpp
@@ -17,7 +17,7 @@
 #include <stdlib.h>
 
 #ifdef _WIN32
-#include <WinSock2.h>
+#include <winsock2.h>
 #else
 #include <sys/time.h>
 #endif
diff --git a/testApp/remote/testMonitorPerformance.cpp b/testApp/remote/testMonitorPerformance.cpp
index 5b66f21..58b1970 100644
--- a/testApp/remote/testMonitorPerformance.cpp
+++ b/testApp/remote/testMonitorPerformance.cpp
@@ -17,7 +17,7 @@
 #include <stdlib.h>
 
 #ifdef _WIN32
-#include <WinSock2.h>
+#include <winsock2.h>
 #else
 #include <sys/time.h>
 #endif
diff --git a/testApp/utils/testInetAddressUtils.cpp b/testApp/utils/testInetAddressUtils.cpp
index 7c2e0a3..1d84e73 100644
--- a/testApp/utils/testInetAddressUtils.cpp
+++ b/testApp/utils/testInetAddressUtils.cpp
@@ -217,7 +217,7 @@ void test_getLoopbackNIF()
 
 #ifdef _WIN32
 // needed for ip_mreq
-#include <Ws2tcpip.h>
+#include <ws2tcpip.h>
 #endif
 
 void test_multicastLoopback()