"Jag borde förstås vetat bättre" ("I should of course have known better") is a single by Swedish pop group Gyllene Tider. Written by the band's lead singer Per Gessle, it was released on February 2, 2005, as the third and final single from Finn 5 fel!, which was the best selling album in Sweden during 2004. The song peaked at No. 23 on the Swedish singles chart, becoming the fourteenth single by the band to chart in their home country and became a new entry at No. 10 on the Svensktoppen (Sveriges Radio chart) before peaking at No. 7 a week later. The release of the single also saw the album re-enter the charts.
The writer of the song Per Gessle said, "This is a sad song, it is about a guy who still has hope." Anders Herrlin, Gyllene Tider's bass player, said it was Finn 5 fel!'s "only real ballad, with strings and everything."