diff --git a/openmc/data/neutron.py b/openmc/data/neutron.py
index 8accabfc7..ed2f4f8b7 100644
--- a/openmc/data/neutron.py
+++ b/openmc/data/neutron.py
@@ -824,7 +824,7 @@ class IncidentNeutron(EqualityMixin):
         return data
 
     @classmethod
-    def from_njoy(cls, filename, temperatures=None, error=0.001, **kwargs):
+    def from_njoy(cls, filename, temperatures=None, **kwargs):
         """Generate incident neutron data by running NJOY.
 
         Parameters
@@ -834,8 +834,6 @@ class IncidentNeutron(EqualityMixin):
         temperatures : iterable of float
             Temperatures in Kelvin to produce data at. If omitted, data is
             produced at room temperature (293.6 K)
-        error : float, optional
-            Fractional error tolerance for NJOY processing.
         **kwargs
             Keyword arguments passed to :func:`openmc.data.njoy.make_ace`
 
@@ -853,7 +851,7 @@ class IncidentNeutron(EqualityMixin):
             ace_file = os.path.join(tmpdir, 'ace')
             xsdir_file = os.path.join(tmpdir, 'xsdir')
             pendf_file = os.path.join(tmpdir, 'pendf')
-            make_ace(filename, temperatures, error, ace_file, xsdir_file,
+            make_ace(filename, temperatures, ace_file, xsdir_file,
                      pendf_file, **kwargs)
 
             # Create instance from ACE tables within library
diff --git a/openmc/data/njoy.py b/openmc/data/njoy.py
index 5365d9740..cf5c4b6c7 100644
--- a/openmc/data/njoy.py
+++ b/openmc/data/njoy.py
@@ -228,8 +228,8 @@ def make_pendf(filename, pendf='pendf', error=0.001, stdout=False):
     return run(commands, tapein, tapeout, stdout)
 
 
-def make_ace(filename, temperatures=None, error=0.001, ace='ace', xsdir='xsdir',
-             pendf=None, **kwargs):
+def make_ace(filename, temperatures=None, ace='ace', xsdir='xsdir',
+             pendf=None, error=0.001, **kwargs):
     """Generate incident neutron ACE file from an ENDF file
 
     Parameters
@@ -239,14 +239,14 @@ def make_ace(filename, temperatures=None, error=0.001, ace='ace', xsdir='xsdir',
     temperatures : iterable of float, optional
         Temperatures in Kelvin to produce ACE files at. If omitted, data is
         produced at room temperature (293.6 K).
-    error : float, optional
-        Fractional error tolerance for NJOY processing.
     ace : str, optional
         Path of ACE file to write
     xsdir : str, optional
         Path of xsdir file to write
     pendf : str, optional
         Path of pendf file to write. If omitted, the pendf file is not saved.
+    error : float, optional
+        Fractional error tolerance for NJOY processing.
     **kwargs
         Keyword arguments passed to :func:`openmc.data.njoy.run`
 
@@ -315,8 +315,8 @@ def make_ace(filename, temperatures=None, error=0.001, ace='ace', xsdir='xsdir',
     return retcode
 
 
-def make_ace_thermal(filename, filename_thermal, temperatures=None, error=0.001,
-                     ace='ace', xsdir='xsdir', **kwargs):
+def make_ace_thermal(filename, filename_thermal, temperatures=None,
+                     ace='ace', xsdir='xsdir', error=0.001, **kwargs):
     """Generate thermal scattering ACE file from ENDF files
 
     Parameters
@@ -328,12 +328,12 @@ def make_ace_thermal(filename, filename_thermal, temperatures=None, error=0.001,
     temperatures : iterable of float, optional
         Temperatures in Kelvin to produce data at. If omitted, data is produced
         at all temperatures given in the ENDF thermal scattering sublibrary.
-    error : float, optional
-        Fractional error tolerance for NJOY processing.
     ace : str, optional
         Path of ACE file to write
     xsdir : str, optional
         Path of xsdir file to write
+    error : float, optional
+        Fractional error tolerance for NJOY processing.
     **kwargs
         Keyword arguments passed to :func:`openmc.data.njoy.run`
 
diff --git a/openmc/data/thermal.py b/openmc/data/thermal.py
index 1d63c1ade..6e7b0fe02 100644
--- a/openmc/data/thermal.py
+++ b/openmc/data/thermal.py
@@ -588,8 +588,7 @@ class ThermalScattering(EqualityMixin):
         return table
 
     @classmethod
-    def from_njoy(cls, filename, filename_thermal, temperatures=None,
-                  error=0.001, **kwargs):
+    def from_njoy(cls, filename, filename_thermal, temperatures=None, **kwargs):
         """Generate incident neutron data by running NJOY.
 
         Parameters
@@ -602,8 +601,6 @@ class ThermalScattering(EqualityMixin):
             Temperatures in Kelvin to produce data at. If omitted, data is
             produced at all temperatures in the ENDF thermal scattering
             sublibrary.
-        error : float, optional
-            Fractional error tolerance for NJOY processing.
         **kwargs
             Keyword arguments passed to :func:`openmc.data.njoy.make_ace_thermal`
 
@@ -620,7 +617,7 @@ class ThermalScattering(EqualityMixin):
             # Run NJOY to create an ACE library
             ace_file = os.path.join(tmpdir, 'ace')
             xsdir_file = os.path.join(tmpdir, 'xsdir')
-            make_ace_thermal(filename, filename_thermal, temperatures, error,
+            make_ace_thermal(filename, filename_thermal, temperatures,
                              ace_file, xsdir_file, **kwargs)
 
             # Create instance from ACE tables within library