diff --git a/src/mc/network/ClientNetworkSystem.h b/src/mc/network/ClientNetworkSystem.h
index c73d9acbfd..1079c466e9 100644
--- a/src/mc/network/ClientNetworkSystem.h
+++ b/src/mc/network/ClientNetworkSystem.h
@@ -3,7 +3,7 @@
 #include "mc/_HeaderOutputPredefine.h"
 #include "mc/network/NetworkSystem.h"
 
-class ClientNetworkSystem : public NetworkSystem {
+class ClientNetworkSystem {
 public:
     // prevent constructor by default
     ClientNetworkSystem& operator=(ClientNetworkSystem const&);
diff --git a/src/mc/network/ServerNetworkSystem.h b/src/mc/network/ServerNetworkSystem.h
index c60056d40e..5ae91e764b 100644
--- a/src/mc/network/ServerNetworkSystem.h
+++ b/src/mc/network/ServerNetworkSystem.h
@@ -7,7 +7,7 @@
 #include "mc/network/NetworkSystem.h"
 #include "mc/services/ServiceReference.h"
 
-class ServerNetworkSystem : NetworkSystem {
+class ServerNetworkSystem {
 public:
     // prevent constructor by default
     ServerNetworkSystem& operator=(ServerNetworkSystem const&);