diff --git a/lib/Predis/Commands/ZSetAdd.php b/lib/Predis/Commands/ZSetAdd.php
index 1c68c535..bb0cf258 100644
--- a/lib/Predis/Commands/ZSetAdd.php
+++ b/lib/Predis/Commands/ZSetAdd.php
@@ -2,11 +2,17 @@
 
 namespace Predis\Commands;
 
+use Predis\Helpers;
+
 class ZSetAdd extends Command {
     public function getId() {
         return 'ZADD';
     }
 
+    protected function filterArguments(Array $arguments) {
+        return Helpers::filterVariadicValues($arguments);
+    }
+
     public function parseResponse($data) {
         return (bool) $data;
     }
diff --git a/lib/Predis/Commands/ZSetRemove.php b/lib/Predis/Commands/ZSetRemove.php
index c549567c..238d9de3 100644
--- a/lib/Predis/Commands/ZSetRemove.php
+++ b/lib/Predis/Commands/ZSetRemove.php
@@ -2,11 +2,17 @@
 
 namespace Predis\Commands;
 
+use Predis\Helpers;
+
 class ZSetRemove extends Command {
     public function getId() {
         return 'ZREM';
     }
 
+    protected function filterArguments(Array $arguments) {
+        return Helpers::filterVariadicValues($arguments);
+    }
+
     public function parseResponse($data) {
         return (bool) $data;
     }