diff --git a/libraries/entities-renderer/src/EntityTreeRenderer.cpp b/libraries/entities-renderer/src/EntityTreeRenderer.cpp
index fc06ebabb2..cbb2abea90 100644
--- a/libraries/entities-renderer/src/EntityTreeRenderer.cpp
+++ b/libraries/entities-renderer/src/EntityTreeRenderer.cpp
@@ -157,7 +157,7 @@ void EntityTreeRenderer::update() {
     deleteReleasedModels();
 }
 
-bool EntityTreeRenderer::findBestZoneAndMaybeContainingEntities(glm::vec3& avatarPosition, QVector<EntityItemID>* entitiesContainingAvatar) {
+bool EntityTreeRenderer::findBestZoneAndMaybeContainingEntities(const glm::vec3& avatarPosition, QVector<EntityItemID>* entitiesContainingAvatar) {
     bool didUpdate = false;
     float radius = 1.0f; // for now, assume 1 meter radius
     QVector<EntityItemPointer> foundEntities;
diff --git a/libraries/entities-renderer/src/EntityTreeRenderer.h b/libraries/entities-renderer/src/EntityTreeRenderer.h
index b2a2d436c4..8534be852d 100644
--- a/libraries/entities-renderer/src/EntityTreeRenderer.h
+++ b/libraries/entities-renderer/src/EntityTreeRenderer.h
@@ -124,7 +124,7 @@ protected:
 
 private:
     void addEntityToScene(EntityItemPointer entity);
-    bool findBestZoneAndMaybeContainingEntities(glm::vec3& avatarPosition, QVector<EntityItemID>* entitiesContainingAvatar);
+    bool findBestZoneAndMaybeContainingEntities(const glm::vec3& avatarPosition, QVector<EntityItemID>* entitiesContainingAvatar);
 
     void applyZonePropertiesToScene(std::shared_ptr<ZoneEntityItem> zone);
     void checkAndCallPreload(const EntityItemID& entityID, const bool reload = false);