diff --git a/src/KV/KVClient.php b/src/KV/KVClient.php
index 1f904b7..ba2ea2a 100644
--- a/src/KV/KVClient.php
+++ b/src/KV/KVClient.php
@@ -294,7 +294,9 @@ public function Tree(string $prefix = '', ?QueryOptions $opts = null): array
         }
 
         $treeHierarchy = [];
-        foreach ($valueList as $path => $kvp) {
+	    /** @var KVPair $kvp */
+        foreach ($valueList as $kvp) {
+            $path = $kvp->getKey();
             $slashPos = strpos($path, '/');
             if (false === $slashPos) {
                 $treeHierarchy[$path] = $kvp;