Correction of the band profile of DIB λ9632 in HD 165784 and DIB λ11970 in HD 183143. Displayed are the observed spectrum (dashed black line); the synthetic spectrum (blue line) of the Mg II line of the background star HD 165784; the He I line of the background star HD 183143 and the corrected spectrum, i.e. the observed spectrum divided by the stellar spectrum, showing the DIB (red line). Wavelengths and wavenumbers are given in the barycentric rest frame.