diff --git a/GUI/Model/FromDomain/GUISampleBuilder.cpp b/GUI/Model/FromDomain/GUISampleBuilder.cpp
index 95a85899f167f3299b52d99d30d891c35b856e57..c501e551974d789dc8fdc46a2d946993f011f2f8 100644
--- a/GUI/Model/FromDomain/GUISampleBuilder.cpp
+++ b/GUI/Model/FromDomain/GUISampleBuilder.cpp
@@ -59,6 +59,15 @@ MaterialItem* findMaterialItem(MaterialItems& matItems, const ISampleNode* node)
     return materialItem;
 }
 
+void copyParticleItem(ParticleItem* particleItem, MaterialItems& matItems, const Particle* particle)
+{
+    particleItem->setAbundance(particle->abundance());
+    particleItem->setPosition(particle->particlePosition());
+    particleItem->setMaterial(findMaterialItem(matItems, particle));
+    GUI::Transform::FromDomain::setRotation(particleItem, particle->rotation());
+    GUI::Transform::FromDomain::setFormFactor(particleItem, particle->formfactor_at_bottom());
+}
+
 } // namespace
 
 namespace GUI::Transform::FromDomain {
@@ -104,16 +113,6 @@ MultiLayerItem* GUISampleBuilder::createMultiLayerItem(const MultiLayer& sample,
     return m_sampleItem;
 }
 
-void GUISampleBuilder::copyParticleItem(ParticleItem* particleItem, MaterialItems& matItems,
-                                        const Particle* particle)
-{
-    particleItem->setAbundance(particle->abundance());
-    particleItem->setPosition(particle->particlePosition());
-    particleItem->setMaterial(findMaterialItem(matItems, particle));
-    FromDomain::setRotation(particleItem, particle->rotation());
-    FromDomain::setFormFactor(particleItem, particle->formfactor_at_bottom());
-}
-
 void GUISampleBuilder::copyParticle(const IParticle* iparticle,
                                     std::function<void(ItemWithParticles*)> addToParent)
 {
diff --git a/GUI/Model/FromDomain/GUISampleBuilder.h b/GUI/Model/FromDomain/GUISampleBuilder.h
index 8c115cd1c5873c7b03ee8e04a38f38a3f6f68d8d..8299fb61cb89abf930cff8e8e9b339e76182054c 100644
--- a/GUI/Model/FromDomain/GUISampleBuilder.h
+++ b/GUI/Model/FromDomain/GUISampleBuilder.h
@@ -39,8 +39,6 @@ public:
 private:
     void copyParticle(const IParticle* particle,
                       std::function<void(ItemWithParticles*)> addToParent);
-    void copyParticleItem(ParticleItem* particleItem, MaterialItems& matItems,
-                          const Particle* particle);
 
     MultiLayerItem* m_sampleItem;
 };