diff --git a/sp/src/vscript/vscript_squirrel.cpp b/sp/src/vscript/vscript_squirrel.cpp
index a16ac7a5..9c3a191c 100644
--- a/sp/src/vscript/vscript_squirrel.cpp
+++ b/sp/src/vscript/vscript_squirrel.cpp
@@ -2249,7 +2249,7 @@ void SquirrelVM::WriteObject(CUtlBuffer* pBuffer, WriteStateMap& writeState, SQI
 
 		SQInteger nparams = 0, nfreevars = 0;
 		sq_getclosureinfo(vm_, idx, &nparams, &nfreevars);
-		if (nfreevars == 0)
+		if (nfreevars == 0 && _closure(obj)->_function->_defaultparams == 0)
 		{
 			pBuffer->PutChar(0);
 
@@ -2279,6 +2279,14 @@ void SquirrelVM::WriteObject(CUtlBuffer* pBuffer, WriteStateMap& writeState, SQI
 				WriteObject(pBuffer, writeState, -1);
 				sq_poptop(vm_);
 			}
+
+			int ndefaultparams = _closure(obj)->_function->_ndefaultparams;
+			for (int i = 0; i < ndefaultparams; ++i)
+			{
+				sq_pushobject(vm_, _closure(obj)->_defaultparams[i]);
+				WriteObject(pBuffer, writeState, -1);
+				sq_poptop(vm_);
+			}
 		}
 
 		if (_closure(obj)->_env)
@@ -2674,6 +2682,17 @@ void SquirrelVM::ReadObject(CUtlBuffer* pBuffer, ReadStateMap& readState)
 				sq_poptop(vm_);
 			}
 
+			int ndefaultparams = _closure(ret)->_function->_ndefaultparams;
+			for (int i = 0; i < ndefaultparams; ++i)
+			{
+				ReadObject(pBuffer, readState);
+				HSQOBJECT obj;
+				sq_resetobject(&obj);
+				sq_getstackobj(vm_, -1, &obj);
+				_closure(ret)->_defaultparams[i] = obj;
+				sq_poptop(vm_);
+			}
+
 			*obj = ret;
 			sq_addref(vm_, obj);
 			sq_pushobject(vm_, *obj);