  An updated analysis regarding the expected nuclear PDF constraints from the
future Large Hadron Electron Collider (LHeC) experiment is presented. The new
study is based on a more flexible small-$x$ parametrization which provides less
biased uncertainty estimates in the region where there are currently no data
constraints. The effect of the LHeC is quantified by directly including a
sample of pseudodata according to the expected precision of this planned
experiment. As a result, a significant reduction of the small-$x$ uncertainties
in sea quarks and gluons is observed.
