diff --git a/Source/Contents/Effects/Skills/MonsterSkillEffects.cpp b/Source/Contents/Effects/Skills/MonsterSkillEffects.cpp
index ed378ef64..e6d4fcaee 100644
--- a/Source/Contents/Effects/Skills/MonsterSkillEffects.cpp
+++ b/Source/Contents/Effects/Skills/MonsterSkillEffects.cpp
@@ -4779,9 +4779,10 @@ void CRichsCoinEffect::OnProcess() {
 
   for (auto it = this->particles.begin(); it != this->particles.end(); ++it) {
     CParticle* particle = *it;
-    particle->position.x = this->position[0];
-    particle->position.y = this->position[1];
-    particle->position.z = this->position[2];
+    vector3d& particlePosition = (*it)->position;
+    particlePosition.x = this->position[0];
+    particlePosition.y = this->position[1];
+    particlePosition.z = this->position[2];
     if (particle) {
       const float angle = particle->animationParameter + 0.015f;
       particle->animationParameter = angle;