diff --git a/external/qp2-dependencies b/external/qp2-dependencies
index bc856147..90ee61f5 160000
--- a/external/qp2-dependencies
+++ b/external/qp2-dependencies
@@ -1 +1 @@
-Subproject commit bc856147f6e626a6616b20344e5b8e3f30f44a92
+Subproject commit 90ee61f5041c7c94a0c605625a264860292813a0
diff --git a/src/csf/conversion.irp.f b/src/csf/conversion.irp.f
index 1ab5ccaa..75f6e539 100644
--- a/src/csf/conversion.irp.f
+++ b/src/csf/conversion.irp.f
@@ -64,13 +64,11 @@ subroutine convertWFfromDETtoCSF(N_st,psi_coef_det_in, psi_coef_cfg_out)
       s = s + popcnt(psi_configuration(k,1,i))
     enddo
 
-    bfIcfg = max(1,nint((binom(s,(s+1)/2)-binom(s,((s+1)/2)+1))))
-
-!    if(iand(s,1) .EQ. 0) then
-!      bfIcfg = max(1,nint((binom(s,s/2)-binom(s,(s/2)+1))))
-!    else
-!      bfIcfg = max(1,nint((binom(s,(s+1)/2)-binom(s,((s+1)/2)+1))))
-!    endif
+    if(iand(s,1) .EQ. 0) then
+      bfIcfg = max(1,nint((binom(s,s/2)-binom(s,(s/2)+1))))
+    else
+      bfIcfg = max(1,nint((binom(s,(s+1)/2)-binom(s,((s+1)/2)+1))))
+    endif
 
     ! perhaps blocking with CFGs of same seniority
     ! can be more efficient