diff --git a/controllers/PlagiarismIthenticateActionHandler.php b/controllers/PlagiarismIthenticateActionHandler.php
index 18e7db3..2938eb0 100644
--- a/controllers/PlagiarismIthenticateActionHandler.php
+++ b/controllers/PlagiarismIthenticateActionHandler.php
@@ -102,7 +102,7 @@ public function launchViewer(array $args, Request $request)
 		// If EULA is required and submission has EULA stamped, we set the applicable EULA
 		// Otherwise get the current EULA from default one and set the applicable
 		// Basically we need to retrieve the available langs details from EULA details
-		static::$_plugin->getContextEulaDetails($context, 'require_eula') == true &&
+		$this->_plugin->getContextEulaDetails($context, 'require_eula') == true &&
 		$submission->getData('ithenticateEulaVersion')
 			? $ithenticate->setApplicableEulaVersion($submission->getData('ithenticateEulaVersion'))
 			: $ithenticate->validateEulaVersion($ithenticate::DEFAULT_EULA_VERSION);