diff --git a/lib/Predis/Commands/ServerEval.php b/lib/Predis/Commands/ServerEval.php
index f6b60deb..fe647871 100644
--- a/lib/Predis/Commands/ServerEval.php
+++ b/lib/Predis/Commands/ServerEval.php
@@ -46,4 +46,14 @@ class ServerEval extends Command
     {
         return false;
     }
+
+    /**
+     * Calculates the SHA1 hash of the body of the script.
+     *
+     * @return string SHA1 hash.
+     */
+    public function getScriptHash()
+    {
+        returns sha1($this->getArgument(0));
+    }
 }