diff --git a/corrlib/toml.py b/corrlib/toml.py
index 14ec058..f0ba525 100644
--- a/corrlib/toml.py
+++ b/corrlib/toml.py
@@ -202,6 +202,7 @@ def import_toml(path: Path, file: str, copy_file: bool=True) -> None:
                     # Temporary solution
                     parameters = {}
                     parameters["rand"] = {}
+                    parameters["rw_fcts"] = []
                     for nrw in range(1):
                         if "nsrc" not in parameters["rw_fcts"][nrw]:
                             parameters["rw_fcts"][nrw]["nsrc"] = 1