diff --git a/NEWS b/NEWS
index 656b5ecc1..ae049b344 100644
--- a/NEWS
+++ b/NEWS
@@ -6,6 +6,7 @@ Enhancements
 
 Bug fixes
  - [core] properly update the last-modified attribute (#4313)
+ - [core] fixed default data value for c_hascertificate (#4442)
  - [web] prevent deletion of special folders using del key
  - [web] fixed SAML2 session timeout handling during XHR requests
  - [web] fixed renaming a folder under iOS
diff --git a/Scripts/mysql-utf8mb4.sql b/Scripts/mysql-utf8mb4.sql
index 043680022..63c8973a6 100644
--- a/Scripts/mysql-utf8mb4.sql
+++ b/Scripts/mysql-utf8mb4.sql
@@ -135,7 +135,7 @@ CREATE TABLE sogo_quick_contact (
 	c_telephonenumber varchar(255) DEFAULT NULL,
 	c_categories      varchar(255) DEFAULT NULL,
 	c_component       varchar(10)  NOT NULL,
-	c_hascertificate  int(11)      DEFAULT NULL,
+	c_hascertificate  int(11)      DEFAULT 0,
 	PRIMARY KEY (c_folder_id,c_name)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 ROW_FORMAT=DYNAMIC;