diff --git a/projects/Alembic/ReadAlembic.cpp b/projects/Alembic/ReadAlembic.cpp
index fa7591dd7..c82570f7e 100644
--- a/projects/Alembic/ReadAlembic.cpp
+++ b/projects/Alembic/ReadAlembic.cpp
@@ -1172,6 +1172,7 @@ struct ReadAlembic : INode {
             frameid = getGlobalState()->frameid;
         }
         auto abctree = std::make_shared<ABCTree>();
+        bool read_face_set = get_input2<bool>("read_face_set");
         {
             auto path = get_input<StringObject>("path")->get();
             if (usedPath != path) {
@@ -1185,7 +1186,6 @@ struct ReadAlembic : INode {
             // fmt::print("GetArchiveStartAndEndTime: {}\n", start);
             // fmt::print("archive.getNumTimeSamplings: {}\n", archive.getNumTimeSamplings());
             auto obj = archive.getTop();
-            bool read_face_set = get_input2<bool>("read_face_set");
             bool outOfRangeAsEmpty = get_input2<bool>("outOfRangeAsEmpty");
             bool skipInvisibleObject = get_input2<bool>("skipInvisibleObject");
             Alembic::Util::uint32_t numSamplings = archive.getNumTimeSamplings();
@@ -1215,7 +1215,7 @@ struct ReadAlembic : INode {
             }
             set_output("namelist", namelist);
         }
-        if (get_input2<bool>("CopyFacesetToMatid")) {
+        if (get_input2<bool>("CopyFacesetToMatid") && read_face_set) {
             abctree->visitPrims([](auto &prim){
                 prim_copy_faceset_to_matid(prim.get());
             });
diff --git a/zeno/src/nodes/neo/PrimMerge.cpp b/zeno/src/nodes/neo/PrimMerge.cpp
index 41d6b8707..b318f991e 100644
--- a/zeno/src/nodes/neo/PrimMerge.cpp
+++ b/zeno/src/nodes/neo/PrimMerge.cpp
@@ -30,7 +30,7 @@ ZENO_API void prim_set_abcpath(PrimitiveObject* prim, std::string path_name) {
 
 ZENO_API void prim_copy_faceset_to_matid(PrimitiveObject* prim) {
     auto &ud = prim->userData();
-    auto faceset_count = ud.get2<int>("faceset_count");
+    auto faceset_count = ud.get2<int>("faceset_count", 0);
     ud.set2("matNum", faceset_count);
     for (auto i = 0; i < faceset_count; i++) {
         auto value = ud.get2<std::string>(format("faceset_{}", i));