diff --git a/nifty6/library/correlated_fields.py b/nifty6/library/correlated_fields.py
index 6120cc82f5c9a6c4d387b2e589c130f04e5e82ff..98b9181589db24d6c416b4f672b51c02f0065815 100644
--- a/nifty6/library/correlated_fields.py
+++ b/nifty6/library/correlated_fields.py
@@ -408,8 +408,12 @@ class CorrelatedFieldMaker:
             If not 0, the first entry of the operators target will be an
             :class:`~nifty.domains.unstructured_domain.UnstructuredDomain`
             with length `total_N`.
-        dofdex : np.array
-            #FixMe
+        dofdex : np.array of integers
+            An integer array specifying the zero mode models used if
+            total_N > 1. It needs to have length of total_N. If total_N=3 and
+            dofdex=[0,0,1], that means that two models for the zero mode are
+            instanciated; the first one is used for the first and second copy
+            of the model and the second is used for the third.
         """
         if dofdex is None:
             dofdex = np.full(total_N, 0)
@@ -472,10 +476,15 @@ class CorrelatedFieldMaker:
             Power law component exponent
         prefix : string
             prefix of the power spectrum parameter domain names
-        index :
-            #FixMe
-        dofdex :
-            #FixMe
+        index : int
+            Position target_subdomain in the final total domain of the
+            correlated field operator.
+        dofdex : np.array
+            An integer array specifying the amplitude models used if
+            total_N > 1. It needs to have length of total_N. If total_N=3 and
+            dofdex=[0,0,1], that means that two models for the zero mode are
+            instanciated; the first one is used for the first and second copy
+            of the model and the second is used for the third.
         harmonic_partner : :class:`~nifty6.domain.Domain`, \
                            :class:`~nifty6.domain_tuple.DomainTuple`
             In which harmonic space to define the power spectrum
diff --git a/test/test_operators/test_adjoint.py b/test/test_operators/test_adjoint.py
index 8bf2692d15a1dc9cc851f1eeb153cdf59f9c5e54..a5ca311181c75e20548aa1b6a1014cd5563bef10 100644
--- a/test/test_operators/test_adjoint.py
+++ b/test/test_operators/test_adjoint.py
@@ -11,7 +11,7 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #
-# Copyright(C) 2013-2019 Max-Planck-Society
+# Copyright(C) 2013-2020 Max-Planck-Society
 #
 # NIFTy is being developed at the Max-Planck-Institut fuer Astrophysik.