diff --git a/application/core/IIssueResolvedChecker.php b/application/core/IIssueResolvedChecker.php
index 04fbe270b..82da67ff7 100644
--- a/application/core/IIssueResolvedChecker.php
+++ b/application/core/IIssueResolvedChecker.php
@@ -11,5 +11,5 @@ interface IIssueResolvedChecker
 	 * @param array $params parameters needed for issue resolution
 	 * @return object with success(true) if issue resolved, success(false) otherwise
 	 */
-	function checkIfIssueIsResolved($params);
+	public function checkIfIssueIsResolved($params);
 }
\ No newline at end of file