diff --git a/openmc/material.py b/openmc/material.py
index 0f5a5a4434..e495357b54 100644
--- a/openmc/material.py
+++ b/openmc/material.py
@@ -338,7 +338,7 @@ class Material(object):
         string += '{0: <16}{1}{2}\n'.format('\tName', '=\t', self._name)
 
         string += '{0: <16}{1}{2}'.format('\tDensity', '=\t', self._density)
-        string += ' ["{0}"]\n'.format(self._density_units)
+        string += ' [{0}]\n'.format(self._density_units)
 
         string += '{0: <16}\n'.format('\tS(a,b) Tables')
 
diff --git a/openmc/nuclide.py b/openmc/nuclide.py
index 6f6f75f9c9..7e7cd5af35 100644
--- a/openmc/nuclide.py
+++ b/openmc/nuclide.py
@@ -88,7 +88,7 @@ class Nuclide(object):
         self._zaid = zaid
 
     def __repr__(self):
-        string = 'Nuclide    -    "{0}"\n'.format(self._name)
+        string = 'Nuclide    -    {0}\n'.format(self._name)
         string += '{0: <16}{1}{2}\n'.format('\tXS', '=\t', self._xs)
         if self._zaid is not None:
             string += '{0: <16}{1}{2}\n'.format('\tZAID', '=\t', self._zaid)