diff --git a/lib/src/collections/observable_map.dart b/lib/src/collections/observable_map.dart
index e83664d..f1c9191 100644
--- a/lib/src/collections/observable_map.dart
+++ b/lib/src/collections/observable_map.dart
@@ -107,6 +107,9 @@
 
   @override
   void notifyChange([ChangeRecord change]) {
+    if (change is MapChangeRecord && change.oldValue == change.newValue) {
+      return;
+    }
     _allChanges.notifyChange(change);
   }