A device for bracing a shell surface in an aircraft fuselage against deformations and consisting of a continuous profile that is arranged so as, after conformation, to be mounted against the shell surface. Notches are spaced at regular distances apart from each other in at least a portion of the profile. The notches extend through a base surface in the profile, and through an intermediate part perpendicular to the base surface. The notches are delimited upwardly by an upper surface that is not encompassed by the notches.