diff --git a/pyreduce/instruments/mcdonald.py b/pyreduce/instruments/mcdonald.py
index d70f681e..f4f9fa6f 100644
--- a/pyreduce/instruments/mcdonald.py
+++ b/pyreduce/instruments/mcdonald.py
@@ -116,7 +116,7 @@ def add_header_info(self, header, mode, **kwargs):
     def get_wavecal_filename(self, header, mode, **kwargs):
         """Get the filename of the wavelength calibration config file"""
         cwd = os.path.dirname(__file__)
-        fname = "{instrument}_{mode}_2D.npz".format(instrument="mcdonald", mode=mode)
+        fname = "mcdonald.npz"
         fname = os.path.join(cwd, "..", "wavecal", fname)
         return fname
 
diff --git a/pyreduce/settings/settings_MCDONALD.json b/pyreduce/settings/settings_MCDONALD.json
index fbdd5c70..19ccf83a 100644
--- a/pyreduce/settings/settings_MCDONALD.json
+++ b/pyreduce/settings/settings_MCDONALD.json
@@ -28,10 +28,12 @@
         "extraction_width": 10
     },
     "wavecal": {
-        "threshold": 100,
-        "dimensionality": "2D",
-        "degree": [6, 6],
-        "manual": false
+        "threshold": 500,
+        "dimensionality": "1D",
+        "degree": 8,
+        "manual": false,
+        "element": "thar",
+        "medium": "vac"
     },
     "freq_comb_master": {
         "extraction_width": 10
diff --git a/pyreduce/wavecal/mcdonald.npz b/pyreduce/wavecal/mcdonald.npz
new file mode 100644
index 00000000..aa30dc76
Binary files /dev/null and b/pyreduce/wavecal/mcdonald.npz differ