diff --git a/src/gl/dynlights/gl_dynlight.cpp b/src/gl/dynlights/gl_dynlight.cpp
index 3fffe3641..ae19ecf60 100644
--- a/src/gl/dynlights/gl_dynlight.cpp
+++ b/src/gl/dynlights/gl_dynlight.cpp
@@ -1081,6 +1081,7 @@ void gl_AttachLight(AActor *actor, unsigned int count, const FLightDefaults *lig
 		light = Spawn<ADynamicLight>(actor->Pos(), NO_REPLACE);
 		light->target = actor;
 		light->owned = true;
+		light->ObjectFlags |= OF_Transient;
 		actor->dynamiclights.Push(light);
 	}
 	light->flags2&=~MF2_DORMANT;
diff --git a/src/gl/scene/gl_scene.cpp b/src/gl/scene/gl_scene.cpp
index 4b7bc762f..b53be4aaa 100644
--- a/src/gl/scene/gl_scene.cpp
+++ b/src/gl/scene/gl_scene.cpp
@@ -1199,7 +1199,6 @@ void FGLInterface::StateChanged(AActor *actor)
 
 void FGLInterface::StartSerialize(FSerializer &arc)
 {
-	gl_DeleteAllAttachedLights();
 	if (arc.BeginObject("glinfo"))
 	{
 		arc("fogdensity", fogdensity)
@@ -1211,8 +1210,11 @@ void FGLInterface::StartSerialize(FSerializer &arc)
 
 void FGLInterface::EndSerialize(FSerializer &arc)
 {
-	gl_RecreateAllAttachedLights();
-	if (arc.isReading()) gl_InitPortals();
+	if (arc.isReading())
+	{
+		gl_RecreateAllAttachedLights();
+		gl_InitPortals();
+	}
 }
 
 //===========================================================================