diff --git a/src/bse/K_driver_init.F b/src/bse/K_driver_init.F
index 0ace8836ab..a7d0654615 100644
--- a/src/bse/K_driver_init.F
+++ b/src/bse/K_driver_init.F
@@ -165,8 +165,10 @@ subroutine K_driver_init(what,iq,Ken,Xk)
  !
  ! BSE_L_kind check
  !==============
- if (.not.STRING_match(BSE_L_kind,"bar").and..not.STRING_match(BSE_L_kind,"full")) &
- & call error('set Lkind = DEFAULT or BAR or FULL')
+ if    (.not.STRING_match(BSE_L_kind,"bar") & 
+ & .and..not.STRING_match(BSE_L_kind,"full") &
+ & .and..not.STRING_match(BSE_L_kind,"tilde")) &
+ & call error('set Lkind = DEFAULT or BAR or FULL or TILDE')
  !
  BS_K_is_ALDA=l_alda_fxc
  if (l_alda_fxc) then