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Only three magnetic $\delta$ Scuti stars are known as of today. HD 41641 is a$\delta$ Scuti star showing chemical peculiarities and rotational modulation ofits light-curve, making it a good magnetic candidate. We acquiredspectropolarimetric observations of this star with Narval at TBL to search forthe presence of a magnetic field and characterize it. We indeed clearly detecta magnetic field in HD 41641, making it the fourth known magnetic $\delta$Scuti star. Our analysis shows that the field is of fossil origin, likemagnetic OBA stars, but with a complex field structure rather than the muchmore usual dipolar structure.

The complex fossil magnetic field of the $\delta$ Scuti star HD\,41641