diff --git a/code/ryzom/client/src/client.cpp b/code/ryzom/client/src/client.cpp
index e824f6529..4e933b6da 100644
--- a/code/ryzom/client/src/client.cpp
+++ b/code/ryzom/client/src/client.cpp
@@ -180,6 +180,7 @@ int main(int argc, char **argv)
 
 	Args.setVersion(getDisplayVersion());
 	Args.setDescription("Ryzom client");
+	Args.addArg("n", "nopatch", "value", "Use this to not use patch system");
 	Args.addArg("p", "profile", "id", "Use this profile to determine what directory to use by default");
 	Args.addAdditionalArg("login", "Login to use", true, false);
 	Args.addAdditionalArg("password", "Password to use", true, false);
diff --git a/code/ryzom/client/src/far_tp.cpp b/code/ryzom/client/src/far_tp.cpp
index 0a594e540..1c2a6e612 100644
--- a/code/ryzom/client/src/far_tp.cpp
+++ b/code/ryzom/client/src/far_tp.cpp
@@ -49,12 +49,12 @@
 #include "login_progress_post_thread.h"
 #include "interface_v3/action_handler_base.h"
 #include "item_group_manager.h"
+#include "nel/misc/cmd_args.h"
 
 #ifdef DEBUG_NEW
 #define new DEBUG_NEW
 #endif
 
-
 using namespace NLMISC;
 using namespace NLNET;
 using namespace NL3D;
@@ -210,6 +210,7 @@ extern bool IsInRingSession;
 extern void selectTipsOfTheDay (uint tips);
 #define BAR_STEP_TP 2
 
+extern NLMISC::CCmdArgs Args;
 
 CLoginStateMachine::TEvent CLoginStateMachine::waitEvent()
 {
@@ -462,12 +463,14 @@ void CLoginStateMachine::run()
 		case st_check_patch:
 			/// check the data to check if patch needed
 			CLoginProgressPostThread::getInstance().step(CLoginStep(LoginStep_PostLogin, "login_step_post_login"));
-			if (!ClientCfg.PatchWanted)
+
+			if (!ClientCfg.PatchWanted || (Args.haveArg("n") && Args.getLongArg("nopatch").front() == "1"))
 			{
 				// client don't want to be patched !
 				_CurrentState = st_display_eula;
 				break;
 			}
+
 			initPatchCheck();
 			SM_BEGIN_EVENT_TABLE
 				if (isBGDownloadEnabled())
@@ -1517,4 +1520,3 @@ void CFarTP::farTPmainLoop()
 	if(welcomeWindow)
 		initWelcomeWindow();
 }
-