We study the next-to-leading order QCD corrections to the same-side/op
posite-side two jet ratio at Fermilab energies and show that the theor
etical uncertainty on the factorization/renormalization scale is reduc
ed. At large pseudorapidity the difference between the predictions for
singular and non-singular gluon distributions is 25% while the remain
ing scale uncertainty is significantly smaller than this.