diff --git a/corrlib/input/openQCD.py b/corrlib/input/openQCD.py
index 8a2b41e..879b555 100644
--- a/corrlib/input/openQCD.py
+++ b/corrlib/input/openQCD.py
@@ -9,7 +9,7 @@ from ..pars.openQCD import qcd2
 
 
 
-def read_ms1_param(path: Path, project: str, file_in_project: str) -> dict[str, Any]:
+def load_ms1_infile(path: Path, project: str, file_in_project: str) -> dict[str, Any]:
     """
     Read the parameters for ms1 measurements from a parameter file in the project.
 
@@ -73,7 +73,7 @@ def read_ms1_param(path: Path, project: str, file_in_project: str) -> dict[str,
     return param
 
 
-def read_ms3_param(path: Path, project: str, file_in_project: str) -> dict[str, Any]:
+def load_ms3_infile(path: Path, project: str, file_in_project: str) -> dict[str, Any]:
     """
     Read the parameters for ms3 measurements from a parameter file in the project.
 
@@ -333,7 +333,7 @@ def load_qcd2_pars(path: Path, project: str, file_in_project: str)  -> dict[str,
     return qcd2.read_qcd2_par_file(fname)
 
 
-def load_ms1_pars(path: Path, project: str, file_in_project: str)  -> dict[str, Any]:
+def load_ms1_parfile(path: Path, project: str, file_in_project: str)  -> dict[str, Any]:
     """
     Thin wrapper around read_qcd2_ms1_par_file, getting the file before reading.
 
diff --git a/corrlib/meas_io.py b/corrlib/meas_io.py
index 0f9ac02..a48f546 100644
--- a/corrlib/meas_io.py
+++ b/corrlib/meas_io.py
@@ -74,7 +74,10 @@ def write_measurement(path: Path, ensemble: str, measurement: dict[str, dict[str
             ms_type = list(measurement.keys())[0]
             if ms_type == 'ms1':
                 if parameter_file is not None:
-                    parameters = openQCD.read_ms1_param(path, uuid, parameter_file)
+                    if parameter_file.endswith(".ms1.in"):
+                        parameters = openQCD.load_ms1_infile(path, uuid, parameter_file)
+                    elif parameter_file.endswith(".ms1.par"):
+                        parameters = openQCD.load_ms1_parfile(path, uuid, parameter_file)
                 else:
                     raise Exception("Need parameter file for this code!")
                 pars = {}
@@ -88,7 +91,7 @@ def write_measurement(path: Path, ensemble: str, measurement: dict[str, dict[str
                     pars[subkey] = json.dumps(parameters["rw_fcts"][i])
             elif ms_type in ['t0', 't1']:
                 if parameter_file is not None:
-                    parameters = openQCD.read_ms3_param(path, uuid, parameter_file)
+                    parameters = openQCD.load_ms3_infile(path, uuid, parameter_file)
                 else:
                     parameters = {}
                     for rwp in ["integrator", "eps", "ntot", "dnms"]:
diff --git a/corrlib/toml.py b/corrlib/toml.py
index add3739..93ba0f3 100644
--- a/corrlib/toml.py
+++ b/corrlib/toml.py
@@ -192,12 +192,16 @@ def import_toml(path: Path, file: str, copy_file: bool=True) -> None:
 
         elif project['code'] == 'openQCD':
             if md['measurement'] == 'ms1':
-                param = openQCD.read_ms1_param(path, uuid, md['param_file'])
+                parameter_file = md['param_file']
+                if parameter_file.endswith(".ms1.in"):
+                    param = openQCD.load_ms1_infile(path, uuid, parameter_file)
+                elif parameter_file.endswith(".ms1.par"):
+                    param = openQCD.load_ms1_parfile(path, uuid, parameter_file)
                 param['type'] = 'ms1'
                 measurement = openQCD.read_rwms(path, uuid, md['path'], param, md["prefix"], version=md["version"], names=md['names'], files=md['files'])
             elif md['measurement'] == 't0':
                 if 'param_file' in md:
-                    param = openQCD.read_ms3_param(path, uuid, md['param_file'])
+                    param = openQCD.load_ms3_infile(path, uuid, md['param_file'])
                 else:
                     param = {}
                     for rwp in ["integrator", "eps", "ntot", "dnms"]:
@@ -207,7 +211,7 @@ def import_toml(path: Path, file: str, copy_file: bool=True) -> None:
                                                  fit_range=int(md.get('fit_range', 5)), postfix=str(md.get('postfix', '')), names=md.get('names', []), files=md.get('files', []))
             elif md['measurement'] == 't1':
                 if 'param_file' in md:
-                    param = openQCD.read_ms3_param(path, uuid, md['param_file'])
+                    param = openQCD.load_ms3_infile(path, uuid, md['param_file'])
                 param['type'] = 't1'
                 measurement = openQCD.extract_t1(path, uuid, md['path'], param, str(md["prefix"]), int(md["dtr_read"]), int(md["xmin"]), int(md["spatial_extent"]),
                                                  fit_range=int(md.get('fit_range', 5)), postfix=str(md.get('postfix', '')), names=md.get('names', []), files=md.get('files', []))