diff --git a/tiny_gltf.h b/tiny_gltf.h
index 012a398..60ae379 100644
--- a/tiny_gltf.h
+++ b/tiny_gltf.h
@@ -3745,6 +3745,7 @@ static void SerializeGltfTexture(Texture &texture, json &o) {
     json extras;
     SerializeValue("extras", texture.extras, o);
   }
+  SerializeExtensionMap(texture.extensions, o);
 }
 
 static void WriteGltfFile(const std::string &output,