diff --git a/src/common/engine/serializer.cpp b/src/common/engine/serializer.cpp
index d0e6ac7c1..bf813118b 100644
--- a/src/common/engine/serializer.cpp
+++ b/src/common/engine/serializer.cpp
@@ -604,6 +604,8 @@ void FSerializer::WriteObjects()
 		{
 			auto obj = w->mDObjects[i];
 
+			if(obj->ObjectFlags & OF_Transient) continue;
+
 			BeginObject(nullptr);
 			w->Key("classtype");
 			w->String(obj->GetClass()->TypeName.GetChars());
diff --git a/src/common/objects/dobjtype.cpp b/src/common/objects/dobjtype.cpp
index f9ccc4c77..b6379106c 100644
--- a/src/common/objects/dobjtype.cpp
+++ b/src/common/objects/dobjtype.cpp
@@ -440,6 +440,10 @@ DObject *PClass::CreateNew()
 		I_Error("Attempt to instantiate abstract class %s.", TypeName.GetChars());
 	}
 	ConstructNative (mem);
+
+	if (Defaults != nullptr)
+		((DObject *)mem)->ObjectFlags |= ((DObject *)Defaults)->ObjectFlags & OF_Transient;
+
 	((DObject *)mem)->SetClass (const_cast<PClass *>(this));
 	InitializeSpecials(mem, Defaults, &PClass::SpecialInits);
 	return (DObject *)mem;
diff --git a/src/scripting/thingdef_data.cpp b/src/scripting/thingdef_data.cpp
index 792675576..cedf305b0 100644
--- a/src/scripting/thingdef_data.cpp
+++ b/src/scripting/thingdef_data.cpp
@@ -396,6 +396,8 @@ static FFlagDef ActorFlagDefs[]=
 	DEFINE_FLAG2(BOUNCE_NotOnShootables, DONTBOUNCEONSHOOTABLES, AActor, BounceFlags),
 	DEFINE_FLAG2(BOUNCE_BounceOnUnrips, BOUNCEONUNRIPPABLES, AActor, BounceFlags),
 	DEFINE_FLAG2(BOUNCE_NotOnSky, DONTBOUNCEONSKY, AActor, BounceFlags),
+	
+	DEFINE_FLAG2(OF_Transient, NOSAVEGAME, AActor, ObjectFlags),
 };
 
 // These won't be accessible through bitfield variables