  We revisit Wagoner et al. (1967), a classic contribution in the development
of Big Bang Nucleosynthesis. We demonstrate that it presents an incorrect
expression for the temperature of the early universe as a function of time in
the high temperature limit, $T \gtrsim 10^{10}$K. As this incorrect expression
has been reproduced elsewhere, we present a corrected form for the initial
conditions required for calculating the formation of the primordial elements in
the Big Bang.
