diff --git a/dadi_cli/parsers/infer_dfe_parsers.py b/dadi_cli/parsers/infer_dfe_parsers.py
index 585012b..782ee99 100644
--- a/dadi_cli/parsers/infer_dfe_parsers.py
+++ b/dadi_cli/parsers/infer_dfe_parsers.py
@@ -109,7 +109,7 @@ def _run_infer_dfe(args: argparse.Namespace) -> None:
                     )
 
     if args.p0 == -1:
-        args.p0 = _calc_p0_from_bounds(args.lbounds, args.ubounds)
+        args.p0 = calc_p0_from_bounds(args.lbounds, args.ubounds)
 
 
     if "://" in args.demo_popt: