diff --git a/Python/PyHSPlasma.pyi b/Python/PyHSPlasma.pyi
index 4fea1822..c8200f9e 100644
--- a/Python/PyHSPlasma.pyi
+++ b/Python/PyHSPlasma.pyi
@@ -4654,7 +4654,9 @@ class plRenderTarget(plBitmap):
     width: int = ...
 
 class plResManager:
-    def __init__(self, version: int = pvUnknown) -> None: ...
+    preserveObjIDs: bool = ...
+
+    def __init__(self, version: int = pvUnknown, preserveObjIDs: bool = False) -> None: ...
     def AddAge(self, age: plAgeInfo) -> None: ...
     def AddObject(self, location: plLocation, object: hsKeyedObject) -> None: ...
     def AddPage(self, page: plPageInfo) -> None: ...
diff --git a/Python/ResManager/pyResManager.cpp b/Python/ResManager/pyResManager.cpp
index 1ab22cb9..950dc7e2 100644
--- a/Python/ResManager/pyResManager.cpp
+++ b/Python/ResManager/pyResManager.cpp
@@ -28,11 +28,15 @@ PY_PLASMA_DEALLOC(ResManager)
 
 PY_PLASMA_INIT_DECL(ResManager)
 {
+    char* kwdlist[] = { "version", "preserveObjIDs", nullptr };
+
     int version = PlasmaVer::pvUnknown;
-    if (!PyArg_ParseTuple(args, "|i", &version))
+    bool preserveObjIDs = false;
+    if (!PyArg_ParseTupleAndKeywords(args, kwds, "|ib", kwdlist, &version, &preserveObjIDs))
         return -1;
 
     self->fThis->setVer((PlasmaVer)version);
+    self->fThis->setPreserveObjIDs(preserveObjIDs);
     return 0;
 }
 
@@ -654,6 +658,13 @@ static PyMethodDef pyResManager_Methods[] = {
     PY_METHOD_TERMINATOR
 };
 
+PY_PROPERTY(bool, ResManager, preserveObjIDs, getPreserveObjIDs, setPreserveObjIDs)
+
+static PyGetSetDef pyResManager_GetSet[] = {
+    pyResManager_preserveObjIDs_getset,
+    PY_GETSET_TERMINATOR
+};
+
 PY_PLASMA_TYPE(ResManager, plResManager, "Resource Manager")
 
 PY_PLASMA_TYPE_INIT(ResManager)
@@ -662,6 +673,7 @@ PY_PLASMA_TYPE_INIT(ResManager)
     pyResManager_Type.tp_init = pyResManager___init__;
     pyResManager_Type.tp_new = pyResManager_new;
     pyResManager_Type.tp_methods = pyResManager_Methods;
+    pyResManager_Type.tp_getset = pyResManager_GetSet;
     if (PyType_CheckAndReady(&pyResManager_Type) < 0)
         return nullptr;
 
diff --git a/core/ResManager/plResManager.cpp b/core/ResManager/plResManager.cpp
index fdac103c..d05df664 100644
--- a/core/ResManager/plResManager.cpp
+++ b/core/ResManager/plResManager.cpp
@@ -71,7 +71,11 @@ plKey plResManager::readUoid(hsStream* S)
     k->readUoid(S);
     if (!k->getLocation().isValid())
         return plKey();
-    return AddKey(k);
+
+    plKey newkey = AddKey(k);
+    if (preserveIDs)
+        newkey->setID(k->getID());
+    return newkey;
 }
 
 void plResManager::writeKey(hsStream* S, const plKey& key)
diff --git a/core/ResManager/plResManager.h b/core/ResManager/plResManager.h
index 87936828..eaac7460 100644
--- a/core/ResManager/plResManager.h
+++ b/core/ResManager/plResManager.h
@@ -106,6 +106,24 @@ class HSPLASMA_EXPORT plResManager
      */
     void setVer(PlasmaVer pv, bool force = false);
 
+    /**
+     * Set whether or not keyed object IDs should be preserved from
+     * PRPs that are read in.  By default, key IDs are reordered to be
+     * consecutive when a PRP is read.  This setting doesn't have any
+     * effect on data already loaded.
+     * \param preserve Preserve keyed object IDs
+     * \sa getPreserveObjIDs()
+     */
+    void setPreserveObjIDs(bool preserve) { preserveIDs = preserve; }
+
+    /**
+     * Get whether or not keyed object IDs are preserved from PRPs
+     * that are read in.  By default, key IDs are reordered to be
+     * consecutive when a PRP is read.
+     * \sa setPreserveObjIDs()
+     */
+    bool getPreserveObjIDs() const { return preserveIDs; }
+
     /**
      * Return the version of data files this ResManager expects to
      * deal with.  Used for reading or writing data to files only.