diff --git a/Sources/General/fbal.f b/Sources/General/fbal.f
index cc54fee..cf35d25 100644
--- a/Sources/General/fbal.f
+++ b/Sources/General/fbal.f
@@ -9,7 +9,7 @@ SUBROUTINE calc_fbal_par(bsubu, bsubv)
       USE vmec_main, ONLY: buco, bvco, equif, iequi,
      1                     jcurv, jcuru, chipf, vp, pres,
      2                     phipf, vpphi, presgrad, ohs,
-     3                     num_eqsolve_retries
+     3                     num_eqsolve_retries, iter2
       USE vmec_params, ONLY: signgs
       USE vmec_dim, ONLY: ns, nrzt, nznt, ns1
       USE realspace, ONLY: pwint, phip