diff --git a/src/cg3protocol.cpp b/src/cg3protocol.cpp
index 20f35a4..84d22c0 100755
--- a/src/cg3protocol.cpp
+++ b/src/cg3protocol.cpp
@@ -49,6 +49,12 @@ bool CG3Protocol::Init(void)
     // base class
     ok = CProtocol::Init();
 
+#ifdef DEBUG_NO_G3_SUPPORT
+    // G3 support can be killed (currently for test purpose)
+    m_bStopThread = true;
+    return true;
+#endif
+
     // update reflector callsign
     m_ReflectorCallsign.PatchCallsign(0, (const uint8 *)"XLX", 3);
 
diff --git a/src/main.h b/src/main.h
index 2b656f6..abf7b6d 100755
--- a/src/main.h
+++ b/src/main.h
@@ -64,6 +64,7 @@
 //#define DEBUG_NO_ERROR_ON_XML_OPEN_FAIL
 //#define DEBUG_DUMPFILE
 //#define DEBUG_NO_G3_ICMP_SOCKET
+//#define DEBUG_NO_G3_SUPPORT
 
 // reflector ---------------------------------------------------