diff --git a/code/damage_isoDuctile.f90 b/code/damage_isoDuctile.f90
index e483d64bd..53fb58cd8 100644
--- a/code/damage_isoDuctile.f90
+++ b/code/damage_isoDuctile.f90
@@ -299,7 +299,7 @@ subroutine damage_isoDuctile_microstructure(subdt,ipc, ip, el)
  damageState(phase)%state(1,constituent) = &
    damageState(phase)%state(2,constituent) + &
    (damageState(phase)%subState0(1,constituent) - damageState(phase)%state(2,constituent))* &
-   exp(-subdt/(damageState(phase)%state(2,constituent)*lattice_DamageMobility(phase)))
+   exp(-subdt/lattice_DamageMobility(phase))
 
 end subroutine damage_isoDuctile_microstructure