  We report a measurement of the ortho-para transition rate in the p$\mu$p
molecule. The experiment was conducted at TRIUMF via the measurement of the
time dependence of the 5.2 MeV neutrons from muon capture in liquid hydrogen.
The measurement yielded an ortho-para rate $\Lambda_{op} = (11.1 \pm 1.7
\pm^{0.9}_{0.6}) \times 10^4$ s$^{-1}$ that is substantially larger than the
earlier result of Bardin {\it et al.} We discuss the striking implications for
the proton's induced pseudoscalar coupling $g_p$.
