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We present the precise multicolour photometry of the eclipsing variable EQ Boo (P = 5d:43, V = 8m:8), component "A" of the visual double star ADS 9422 (F7 V+G0 V, ½ = 1.3", ¢mag = 0:7). From the analysis of these data we can suppose the existence of the fourth component of a late spectral class.