diff --git a/src/ClientCapabilities.php b/src/ClientCapabilities.php
index f20417a..766f817 100644
--- a/src/ClientCapabilities.php
+++ b/src/ClientCapabilities.php
@@ -28,7 +28,7 @@ public function toArray(): array
         $data = [];
         if ($this->roots || $this->rootsListChanged) {
             $data['roots'] = new \stdClass();
-            if ($this->rootsListChanged) {
+            if ($this->rootsListChanged !== null) {
                 $data['roots']->listChanged = $this->rootsListChanged;
             }
         }
@@ -62,6 +62,7 @@ public static function fromArray(array $data): static
         }
 
         return new static(
+            $rootsEnabled,
             $rootsListChanged,
             $sampling,
             $data['experimental'] ?? null