diff --git a/packages/entity/trait/index.js b/packages/entity/trait/index.js
index 37ed3d6..66c8649 100644
--- a/packages/entity/trait/index.js
+++ b/packages/entity/trait/index.js
@@ -108,6 +108,11 @@ export class Trait extends decorate(class {}) {
     return false;
   }
 
+  setDirty() {
+    this._fastDirtyCheck = true;
+    this.entity._fastDirtyCheck = true;
+  }
+
   stateDifferences() {
     const differences = {};
     for (const key in this.state) {
@@ -154,8 +159,7 @@ export function StateProperty(key, meta = {}) {
     `);
     meta.set = meta.set || new Function('value', `
       if (value !== this.${transformedProperty}) {
-        this._fastDirtyCheck = true;
-        this.entity._fastDirtyCheck = true;
+        this.setDirty();
       }
       this.${transformedProperty} = value;
       this.state['${key}'] = value;
diff --git a/packages/entity/traits/positioned.trait.js b/packages/entity/traits/positioned.trait.js
index 973c236..14a5ac9 100644
--- a/packages/entity/traits/positioned.trait.js
+++ b/packages/entity/traits/positioned.trait.js
@@ -62,8 +62,7 @@ export class Positioned extends decorate(Trait) {
     if (AVOCADO_SERVER) {
       this.state.x = newPosition[0];
       this.state.y = newPosition[1];
-      this.entity._fastDirtyCheck = true;
-      this._fastDirtyCheck = true;
+      this.setDirty();
     }
     this.entity.emit('positionChanged', oldPosition, newPosition);
   }