diff --git a/nifty/domain_object.py b/nifty/domain_object.py
index c6e32270fb7869f968bd8f025a435d67287f6077..ddf57c36bb881260da29c9acfd49066b2aeb006b 100644
--- a/nifty/domain_object.py
+++ b/nifty/domain_object.py
@@ -19,7 +19,6 @@
 from __future__ import division
 import abc
 from .nifty_meta import NiftyMeta
-
 from future.utils import with_metaclass
 
 
@@ -137,7 +136,7 @@ class DomainObject(with_metaclass(
 
         """
         raise NotImplementedError(
-            "There is no generic scalar_weight method for DomainObject.")
+            "There is no generic scalar_dvol method for DomainObject.")
 
     def dvol(self):
         """ Returns the volume factors of this domain, either as a floating
diff --git a/nifty/spaces/power_space/power_space.py b/nifty/spaces/power_space/power_space.py
index c823f5fcac3f980b03a78b98d7023691cd918867..a82529980fac45adf67e4e9a8355ba27125c76cb 100644
--- a/nifty/spaces/power_space/power_space.py
+++ b/nifty/spaces/power_space/power_space.py
@@ -198,11 +198,7 @@ class PowerSpace(Space):
         return self.shape[0]
 
     def scalar_dvol(self):
-        return None
-
-    def dvol(self):
-        # MR FIXME: this will probably change to 1 soon
-        return np.asarray(self.rho, dtype=np.float64)
+        return 1.
 
     def get_k_length_array(self):
         return self.kindex.copy()
diff --git a/test/test_spaces/test_power_space.py b/test/test_spaces/test_power_space.py
index 597af9bc537aa705362fa156bdd21778fd361f4c..7f2cc1f74ac5ea9849346721c981b5c6fdb041cf 100644
--- a/test/test_spaces/test_power_space.py
+++ b/test/test_spaces/test_power_space.py
@@ -129,4 +129,4 @@ class PowerSpaceFunctionalityTest(unittest.TestCase):
 
     def test_dvol(self):
         p = PowerSpace(harmonic_partner=RGSpace(10,harmonic=True))
-        assert_almost_equal(p.dvol(),p.rho)
+        assert_almost_equal(p.dvol(),1.)