  In the work we present the results of two deep broad-band observations of the
poorly studied X-ray pulsar IGR J19294+1816 obtained with the NuSTAR
observatory. The source was observed during Type I outburst and in the
quiescent state. In the bright state a cyclotron absorption line in the energy
spectrum was discovered at $E_{\rm cyc}=42.8\pm0.7$ keV. Spectral and timing
analysis prove the ongoing accretion also during the quiescent state of the
source. Based on the long-term flux evolution, particularly on the transition
of the source to the bright quiescent state with luminosity around $10^{35}$
erg s$^{-1}$, we concluded that IGR J19294+1816 switched to the accretion from
the "cold" accretion disc between Type I outbursts. We also report the updated
orbital period of the system.
