diff --git a/src/Metadatable.js b/src/Metadatable.js
index a4878b99..5fc5f4ff 100644
--- a/src/Metadatable.js
+++ b/src/Metadatable.js
@@ -43,6 +43,10 @@ class extends parentClass {
     const oldValue = base[property];
     base[property] = value;
     
+    if(value === oldValue) {
+      return;
+    }
+    
     /**
     * @event Metadatable#metadataUpdate
     * @param {string} key