diff --git a/src/database.cpp b/src/database.cpp
index 1e9ad61b..657ecdc2 100644
--- a/src/database.cpp
+++ b/src/database.cpp
@@ -51,7 +51,7 @@ bool Database::migrate() {
 bool Database::migrateTo1() {
     QSqlQuery query(QSqlDatabase::database());
     TRUE_OR_RETURN(execute(QStringLiteral("CREATE TABLE IF NOT EXISTS Feeds (name TEXT, url TEXT);")));
-    TRUE_OR_RETURN(execute(QStringLiteral("CREATE TABLE IF NOT EXISTS Entries (feed TEXT, id TEXT, title TEXT, content TEXT);")));
+    TRUE_OR_RETURN(execute(QStringLiteral("CREATE TABLE IF NOT EXISTS Entries (feed TEXT, id TEXT UNIQUE, title TEXT, content TEXT);")));
     TRUE_OR_RETURN(execute(QStringLiteral("CREATE TABLE IF NOT EXISTS Authors (id TEXT, name TEXT, uri TEXT, email TEXT);")));
     TRUE_OR_RETURN(execute(QStringLiteral("PRAGMA user_version = 1;")));
     return true;