diff --git a/main/gradebook/lib/be/studentpublicationlink.class.php b/main/gradebook/lib/be/studentpublicationlink.class.php
index 66d51d7ab4..fc8ef68b73 100755
--- a/main/gradebook/lib/be/studentpublicationlink.class.php
+++ b/main/gradebook/lib/be/studentpublicationlink.class.php
@@ -158,27 +158,32 @@ class StudentPublicationLink extends AbstractLink
 	public function calc_score($stud_id = null)
 	{
 		$stud_id = intval($stud_id);
-		$tbl_stats = Database::get_course_table(TABLE_STUDENT_PUBLICATION);
-		$sql = 'SELECT * FROM '.$tbl_stats."
+		$table = Database::get_course_table(TABLE_STUDENT_PUBLICATION);
+		$sql = 'SELECT * FROM '.$table."
     			WHERE
     				c_id = {$this->course_id} AND
     				id  = '".intval($this->get_ref_id())."' AND
-    				session_id	= ".api_get_session_id()."";
+    				session_id	= ".api_get_session_id()."
+				"
+		;
+
 		$query = Database::query($sql);
 		$assignment = Database::fetch_array($query);
 
-		if (count($assignment)==0) {
-			$v_assigment_id ='0';
+		if (count($assignment) == 0) {
+			$parentId = '0';
 		} else {
-			$v_assigment_id = $assignment['id'];
+			$parentId = $assignment['id'];
 		}
-		$sql = 'SELECT * FROM '.$tbl_stats.'
+
+		$sql = 'SELECT * FROM '.$table.'
     			WHERE
     				c_id = '.$this->course_id.' AND
     				active = 1 AND
-    				parent_id ="'.$v_assigment_id.'" AND
-    				session_id='.api_get_session_id().'';
-
+    				parent_id = "'.$parentId.'" AND
+    				session_id = '.api_get_session_id() .' AND
+    				qualificator_id <> 0
+				';
 		if (!empty($stud_id)) {
 			$sql .= " AND user_id = $stud_id ";
 		}