diff --git a/SimPEG/Fields.py b/SimPEG/Fields.py
index 1801bedc..9baa32f8 100644
--- a/SimPEG/Fields.py
+++ b/SimPEG/Fields.py
@@ -141,11 +141,8 @@ class Fields(object):
             # Aliased fields
             alias, loc, func = self.aliasFields[name]
 
-            srcII   = np.array(self.survey.srcList)[ind]
-            if isinstance(srcII, np.ndarray):
-                srcII = srcII.tolist()
-            if len(srcII) == 1:
-                srcII = srcII[0]
+            srcII = np.array(self.survey.srcList)[ind]
+            srcII = srcII.tolist()
 
             if type(func) is str:
                 assert hasattr(self, func), 'The alias field function is a string, but it does not exist in the Fields class.'
@@ -238,11 +235,8 @@ class TimeFields(Fields):
             pointerFields = pointerFields.reshape(pointerShape, order='F')
 
             timeII = np.arange(self.survey.prob.nT + 1)[timeInd]
-            srcII   = np.array(self.survey.srcList)[srcInd]
-            if isinstance(srcII, np.ndarray):
-                srcII = srcII.tolist()
-            if len(srcII) == 1:
-                srcII = srcII[0]
+            srcII  = np.array(self.survey.srcList)[srcInd]
+            srcII  = srcII.tolist()
 
             if timeII.size == 1:
                 pointerShapeDeflated = self._correctShape(alias, ind, deflate=True)
diff --git a/SimPEG/Tests/test_Fields.py b/SimPEG/Tests/test_Fields.py
index 22189a15..629189b8 100644
--- a/SimPEG/Tests/test_Fields.py
+++ b/SimPEG/Tests/test_Fields.py
@@ -147,7 +147,7 @@ class FieldsTest_Alias(unittest.TestCase):
 
     def test_aliasFunction(self):
         def alias(e, ind):
-            self.assertTrue(ind is self.Src0)
+            self.assertTrue(ind[0] is self.Src0)
             return self.F.mesh.edgeCurl * e
         F = Problem.Fields(self.F.mesh, self.F.survey, knownFields={'e':'E'}, aliasFields={'b':['e','F',alias]})
         e = np.random.rand(F.mesh.nE,1)
@@ -343,7 +343,7 @@ class FieldsTest_Time_Aliased(unittest.TestCase):
         count = [0]
         def alias(e, srcInd, timeInd):
             count[0] += 1
-            self.assertTrue(srcInd is self.Src0)
+            self.assertTrue(srcInd[0] is self.Src0)
             return self.F.mesh.edgeCurl * e
         F = Problem.TimeFields(self.F.mesh, self.F.survey, knownFields={'e':'E'}, aliasFields={'b':['e','F',alias]})
         e = np.random.rand(F.mesh.nE,1,nT)