diff --git a/tiled_wall/tiled_wall_data.cpp b/tiled_wall/tiled_wall_data.cpp
index 5912158..e1cd696 100644
--- a/tiled_wall/tiled_wall_data.cpp
+++ b/tiled_wall/tiled_wall_data.cpp
@@ -56,12 +56,12 @@ Ref<Texture> TiledWallData::get_texture(const int index) const {
 
 	return _textures.get(index);
 }
-void TiledWallData::set_texture(const int index, const Ref<Texture> texture) {
+void TiledWallData::set_texture(const int index, const Ref<Texture> &texture) {
 	ERR_FAIL_INDEX(index, _textures.size());
 
 	_textures.set(index, texture);
 }
-void TiledWallData::add_texture(const Ref<Texture> texture) {
+void TiledWallData::add_texture(const Ref<Texture> &texture) {
 	_textures.push_back(texture);
 }
 void TiledWallData::remove_texture(const int index) {
@@ -100,12 +100,12 @@ Ref<Texture> TiledWallData::get_flavour_texture(const int index) const {
 
 	return _flavour_textures.get(index);
 }
-void TiledWallData::set_flavour_texture(const int index, const Ref<Texture> texture) {
+void TiledWallData::set_flavour_texture(const int index, const Ref<Texture> &texture) {
 	ERR_FAIL_INDEX(index, _flavour_textures.size());
 
 	_flavour_textures.set(index, texture);
 }
-void TiledWallData::add_flavour_texture(const Ref<Texture> texture) {
+void TiledWallData::add_flavour_texture(const Ref<Texture> &texture) {
 	_flavour_textures.push_back(texture);
 }
 void TiledWallData::remove_flavour_texture(const int index) {
diff --git a/tiled_wall/tiled_wall_data.h b/tiled_wall/tiled_wall_data.h
index 3589d85..0f49567 100644
--- a/tiled_wall/tiled_wall_data.h
+++ b/tiled_wall/tiled_wall_data.h
@@ -61,8 +61,8 @@ public:
 
 	//textures
 	Ref<Texture> get_texture(const int index) const;
-	void set_texture(const int index, const Ref<Texture> texture);
-	void add_texture(const Ref<Texture> texture);
+	void set_texture(const int index, const Ref<Texture> &texture);
+	void add_texture(const Ref<Texture> &texture);
 	void remove_texture(const int index);
 
 	int get_texture_count() const;
@@ -72,8 +72,8 @@ public:
 
 	//flavour_textures
 	Ref<Texture> get_flavour_texture(const int index) const;
-	void set_flavour_texture(const int index, const Ref<Texture> texture);
-	void add_flavour_texture(const Ref<Texture> texture);
+	void set_flavour_texture(const int index, const Ref<Texture> &texture);
+	void add_flavour_texture(const Ref<Texture> &texture);
 	void remove_flavour_texture(const int index);
 
 	int get_flavour_texture_count() const;