Within subjects ANOVA pairwise comparisons - is there a way to use TUKEY HSD?

I am running a 3 x 4 repeated measures within subjects ANOVA - the options SPSS gives me for the pairwise adjustments is LSD, Bonferonni and Sidak. However, I need to run post hoc using TUKEY HSD. I tried changing bonferroni for TUKEY in the syntax but to no avail. Just to emphasise, I am aware that there is a function for Tukey for between subjects factors however I want to emphasise that I need it for my within subjects analysis.

Is there anything in the syntax I can do that I have't done already?

Many thanks!