diff --git a/src/Handler/AbstractHandler.php b/src/Handler/AbstractHandler.php
index dab08ed..f483335 100644
--- a/src/Handler/AbstractHandler.php
+++ b/src/Handler/AbstractHandler.php
@@ -95,7 +95,7 @@ protected function createChunkFileName($additionalName = null)
         // ensure that the chunk name is for unique for the client session
         $useSession = $this->config->chunkUseSessionForName();
         $useBrowser = $this->config->chunkUseBrowserInfoForName();
-        if ($useSession && $this->canUseSession() === false) {
+        if ($useSession && static::canUseSession() === false) {
             $useBrowser = true;
             $useSession = false;
         }
@@ -154,4 +154,4 @@ abstract public function isChunkedUpload();
      * @return int
      */
     abstract public function getPercentageDone();
-}
\ No newline at end of file
+}