diff --git a/ext/comment/main.php b/ext/comment/main.php
index 10c6a531..0a65afd6 100644
--- a/ext/comment/main.php
+++ b/ext/comment/main.php
@@ -111,7 +111,7 @@ class CommentList extends Extension
 					image_id INTEGER NOT NULL,
 					owner_id INTEGER NOT NULL,
 					owner_ip SCORE_INET NOT NULL,
-					posted TIMESTAMP DEFAULT NULL,
+					posted TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
 					comment TEXT NOT NULL,
 					FOREIGN KEY (image_id) REFERENCES images(id) ON DELETE CASCADE,
 					FOREIGN KEY (owner_id) REFERENCES users(id) ON DELETE RESTRICT
@@ -129,7 +129,7 @@ class CommentList extends Extension
 					image_id INTEGER NOT NULL,
 					owner_id INTEGER NOT NULL,
 					owner_ip CHAR(16) NOT NULL,
-					posted TIMESTAMP DEFAULT NULL,
+					posted TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
 					comment TEXT NOT NULL
 				");
                 $database->execute("CREATE INDEX comments_image_id_idx ON comments(image_id)", []);