crystalline Form I ibrutinib

A crystalline form of ibrutinib, designated as Form I, having a pattern of X-ray diffraction powder comprising the following 2θ values ​​measured using CuKa radiation: 5.2 ° ± 0.2 °, 17.6 ° ± 0 , 2 °, and 22.1 ° ± 0.2 °.