diff --git a/README.md b/README.md
index 7067a15..8209fd6 100644
--- a/README.md
+++ b/README.md
@@ -156,7 +156,18 @@ $point2d = new stdClass();
 $point2d->x = 10;
 $point2d->y = 20;
 
-$point3d = O::assoc('z', 30, $point2d);
+$point3d = O::assoc('z', 30, $point2d); // {"x": 10, "y": 20, "z": 30}
+```
+
+- **dissoc** - removes a key from an object
+
+```php
+$point3d = new stdClass();
+$point3d->x = 10;
+$point3d->y = 20;
+$point3d->z = 30;
+
+$point2d = O::dissoc('z', 30, $point3d); // {"x": 10, "y": 20}
 ```
 
 ## Future plans
diff --git a/src/O.php b/src/O.php
index 27a9b6b..c7c9bfc 100644
--- a/src/O.php
+++ b/src/O.php
@@ -49,4 +49,10 @@ public static function assoc(string $key, $value, object $data): object {
         $data->{$key} = $value;
         return $data;
     }
+
+    // O::dissoc('foo')
+    public static function dissoc(string $key, object $data): object {
+        unset($data->{$key});
+        return $data;
+    }
 }