diff --git a/src/maploader/maploader.cpp b/src/maploader/maploader.cpp
index 279f331e1..c7524f43f 100644
--- a/src/maploader/maploader.cpp
+++ b/src/maploader/maploader.cpp
@@ -3599,6 +3599,29 @@ DEFINE_ACTION_FUNCTION(DLevelPostProcessor, SetThingArgument)
 	return 0;
 }
 
+DEFINE_ACTION_FUNCTION(DLevelPostProcessor, GetThingID)
+{
+	PARAM_SELF_PROLOGUE(DLevelPostProcessor);
+	PARAM_UINT(thing);
+
+	const int id = thing < self->loader->MapThingsConverted.Size()
+		? self->loader->MapThingsConverted[thing].thingid : 0;
+	ACTION_RETURN_INT(id);
+}
+
+DEFINE_ACTION_FUNCTION(DLevelPostProcessor, SetThingID)
+{
+	PARAM_SELF_PROLOGUE(DLevelPostProcessor);
+	PARAM_UINT(thing);
+	PARAM_INT(id);
+
+	if (thing < self->loader->MapThingsConverted.Size())
+	{
+		self->loader->MapThingsConverted[thing].thingid = id;
+	}
+	return 0;
+}
+
 DEFINE_ACTION_FUNCTION(DLevelPostProcessor, SetVertex)
 {
 	PARAM_SELF_PROLOGUE(DLevelPostProcessor);
diff --git a/wadsrc/static/zscript/level_postprocessor.zs b/wadsrc/static/zscript/level_postprocessor.zs
index 29a747310..e1f05bec7 100644
--- a/wadsrc/static/zscript/level_postprocessor.zs
+++ b/wadsrc/static/zscript/level_postprocessor.zs
@@ -35,6 +35,9 @@ class LevelPostProcessor native play
 	protected native uint GetThingFlags(uint thing);
 	protected native void SetThingFlags(uint thing, uint flags);
 
+	protected native int GetThingID(uint thing);
+	protected native void SetThingID(uint thing, int id);
+
 	protected native int GetThingSpecial(uint thing);
 	protected native void SetThingSpecial(uint thing, int special);