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A simple scheme for avoiding non-spherical double counting in the combinationof density func- tional theory with dynamical mean-field theory (DFT+DMFT)isdeveloped. It is applied to total- energy calculations and structuraloptimization of the pnictide superconductor LaFeAsO. The results are comparedto a recently proposed "exact" double-counting formulation. Both schemes bringthe optimized Fe-As interatomic distance close to the experimental value. Thisresolves the long stand- ing controversy between DFT+DMFT and experiment forthe structural optimization of LaFeAsO.

The role of non-spherical double counting in DFT+DMFT: total energy and structural optimization of pnictide superconductors