Tubulin glutamylation is a reversible modification of the microtubules that regulates cilia stability and function. The addition of glutamates to the microtubule is catalyzed by members of the TTLL family of enzymes, while the removal is carried out by a family of cytosolic carboxypeptidase (CCP) enzymes.C. eleganshas two deglutamylating enzymes,CCPP-1andCCPP-6.CCPP-1is required for ciliary stability and function in the worm, howeverCCPP-6is dispensable for cilia integrity. To investigate redundancy between the two deglutamylating enzymes we made accpp-1(ok1821);ccpp-6(ok382)double mutant. The double mutant shows normal viability, and the dye-filling phenotypes are not worse than theccpp-1single mutant, suggesting thatCCPP-1andCCPP-6do not function redundantly inC. eleganscilia.