diff --git a/src/ecpy/curves.py b/src/ecpy/curves.py
index 1228eed..c39feac 100644
--- a/src/ecpy/curves.py
+++ b/src/ecpy/curves.py
@@ -326,7 +326,8 @@ class WeierstrassCurve(Curve):
     def __init__(self, domain):
         """ Built an new short Weierstrass curve with the provided parameters. """
         self._domain = {}
-        self._set(domain, ('name','type', 'size',
+        self._domain['type'] = curve_defs.WEIERSTRASS
+        self._set(domain, ('name', 'size',
                               'a','b','field','generator','order','cofactor'))
 
 
@@ -506,7 +507,8 @@ class TwistedEdwardCurve(Curve):
     def __init__(self, domain):
         """ Built an new short twisted Edward curve with the provided parameters.  """
         self._domain = {}
-        self._set(domain, ('name','type','size',
+        self._domain['type'] = curve_defs.TWISTEDEDWARD
+        self._set(domain, ('name','size',
                               'a','d','field','generator','order'))
 
     def _coord_size(self):
@@ -766,9 +768,10 @@ class MontgomeryCurve(Curve):
     """
 
     def __init__(self, domain):
-        """ Built an new short twisted Edward curve with the provided parameters.  """
+        """ Built an new short Montgomery curve with the provided parameters.  """
         self._domain = {}
-        self._set(domain, ('name','type','size',
+        self._domain['type'] = curve_defs.MONTGOMERY
+        self._set(domain, ('name','size',
                            'a','b','field','generator','order'))
         #inv4 = pow(4,p-2,p)
         #self.a24  = ((self.a+2)*inv4)%p