diff --git a/db.go b/db.go
index 7d8bfb5..f931e15 100644
--- a/db.go
+++ b/db.go
@@ -15,6 +15,10 @@ type Database struct {
 func InitDatabase(database *Database, conn *sql.DB) {
 	panicOnNil(database)
 
+	if database.db != nil {
+		panic("database is initialized already")
+	}
+
 	*database = Database{
 		db:    conn,
 		stmts: map[string]*sql.Stmt{},