diff --git a/SimPEG/MT/SurveyMT.py b/SimPEG/MT/SurveyMT.py
index b86ac6c2..83c1f81a 100644
--- a/SimPEG/MT/SurveyMT.py
+++ b/SimPEG/MT/SurveyMT.py
@@ -536,9 +536,9 @@ class Data(SimPEGsurvey.Data):
 
         """
         if srcType=='primary':
-            src = SrcMT.src_polxy_1Dprimary
+            src = SrcMT.polxy_1Dprimary
         elif srcType=='total':
-            src = SrcMT.src_polxy_1DhomotD
+            src = SrcMT.polxy_1DhomotD
         else:
             raise NotImplementedError('{:s} is not a valid source type for MTdata')