Franck Etoundi gave Cameroon a 35th-minute lead in the Africa Cup of Nations warm-up, having previously struck the crossbar in Yaounde.
However, Crystal Palace midfielder Bolasie popped up deep in second-half stoppage time to ensure his side avoided defeat.
DR Congo kick off their AFCON campaign against Zambia on January 18, while Cameroon face Mali two days later.
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