diff --git a/tiny_gltf.h b/tiny_gltf.h
index 720f7f3..3fac9d2 100644
--- a/tiny_gltf.h
+++ b/tiny_gltf.h
@@ -6374,7 +6374,8 @@ static void SerializeGltfAccessor(Accessor &accessor, json &o) {
   SerializeNumberProperty<size_t>("count", accessor.count, o);
   SerializeNumberArrayProperty<double>("min", accessor.minValues, o);
   SerializeNumberArrayProperty<double>("max", accessor.maxValues, o);
-  SerializeValue("normalized", Value(accessor.normalized), o);
+  if (accessor.normalized)
+    SerializeValue("normalized", Value(accessor.normalized), o);
   std::string type;
   switch (accessor.type) {
     case TINYGLTF_TYPE_SCALAR: