diff --git a/packages/entity/list/index.js b/packages/entity/list/index.js
index 543d5e6..4e0314f 100644
--- a/packages/entity/list/index.js
+++ b/packages/entity/list/index.js
@@ -59,24 +59,29 @@ export class EntityList extends decorate(class {}) {
 
   patchStateStep(uuid, step) {
     const entity = this._entities[uuid];
-    if ('remove' === step.op && '/' === step.path) {
-      // Maybe already destroyed on the client?
-      if (entity && entity.is('existent')) {
-        entity.destroy();
+    if ('/' === step.path) {
+      switch (step.op) {
+        case 'add':
+          // New entity. Create with patch as traits.
+          const newEntity = (new Entity()).fromJSON({
+            traits: step.value,
+          });
+          newEntity.instanceUuid = uuid;
+          this.addEntity(newEntity);
+          break;
+        case 'remove':
+          // Maybe already destroyed on the client?
+          if (entity && entity.is('existent')) {
+            entity.destroy();
+          }
+          break;
       }
+      return;
     }
-    if (entity) {
+    if ('replace' === step.op && entity) {
       // Exists; patch.
       entity.patchState([step]);
     }
-    else {
-      // New entity. Create with patch as traits.
-      const newEntity = (new Entity()).fromJSON({
-        traits: step.value,
-      });
-      newEntity.instanceUuid = uuid;
-      this.addEntity(newEntity);
-    }
   }
 
   get quadTree() {