diff --git a/patch/01_ryzom_debug_callNativeCallBack.patch b/patch/01_ryzom_debug_callNativeCallBack.patch
new file mode 100644
index 000000000..4f08e09fe
--- /dev/null
+++ b/patch/01_ryzom_debug_callNativeCallBack.patch
@@ -0,0 +1,10 @@
+--- code/ryzom/server/src/ai_service/script_vm.cpp.origin	2018-04-20 21:44:21.605504352 +0200
++++ code/ryzom/server/src/ai_service/script_vm.cpp	2018-04-20 21:45:30.011307907 +0200
+@@ -919,6 +919,7 @@
+ 				string const& outParamsSig = CStringMapper::unmap(*((TStringId*)&opcodes[++index]));
+ 				if (sc)
+ 				{
++					nlinfo ("launch callNativeCallBack: funcName:%s mode:%d inParamsSig:'%s' outParamsSig:'%s'", funcName.c_str(), mode, inParamsSig.c_str(), outParamsSig.c_str()); 
+ 					sc->callNativeCallBack(thisContext, funcName, mode, inParamsSig, outParamsSig, &stack);
+ 				}
+ 				else