diff --git a/projects/Alembic/WriteAlembic.cpp b/projects/Alembic/WriteAlembic.cpp
index 24e0c00374..662145c593 100644
--- a/projects/Alembic/WriteAlembic.cpp
+++ b/projects/Alembic/WriteAlembic.cpp
@@ -302,7 +302,7 @@ struct WriteAlembic2 : INode {
     virtual void apply() override {
         auto prim = get_input<PrimitiveObject>("prim");
         bool flipFrontBack = get_input2<int>("flipFrontBack");
-        float fps = get_input2<float>("fps");
+        float fps = has_input("fps")? get_input2<float>("fps") : 24.0f;
         int frameid;
         if (has_input("frameid")) {
             frameid = get_input2<int>("frameid");
@@ -493,7 +493,7 @@ ZENDEFNODE(WriteAlembic2, {
         {"writepath", "path", ""},
         {"int", "frame_start", "0"},
         {"int", "frame_end", "100"},
-        {"float", "fps", "24"},
+        {"fps"},
         {"bool", "flipFrontBack", "1"},
     },
     {},