diff --git a/components/net/sf/briar/db/JdbcDatabase.java b/components/net/sf/briar/db/JdbcDatabase.java
index 44ba21db345d0e6cd2b54fa7312cb3be5853a5fc..38cb62911dd85c6b738b486718f3b05bce06c252 100644
--- a/components/net/sf/briar/db/JdbcDatabase.java
+++ b/components/net/sf/briar/db/JdbcDatabase.java
@@ -47,7 +47,7 @@ abstract class JdbcDatabase implements Database<Connection> {
 		+ " parentId HASH NOT NULL,"
 		+ " groupId HASH NOT NULL,"
 		+ " authorId HASH NOT NULL,"
-		+ " timestamp BIGINT NOT NULL,"
+		+ " timestamp TIMESTAMP NOT NULL,"
 		+ " size INT NOT NULL,"
 		+ " raw BLOB NOT NULL,"
 		+ " sendability INT NOT NULL,"