diff --git a/simpegMT/SurveyMT.py b/simpegMT/SurveyMT.py
index c8a759cc..33c28d71 100644
--- a/simpegMT/SurveyMT.py
+++ b/simpegMT/SurveyMT.py
@@ -327,7 +327,9 @@ class srcMT(SrcFDEM): # Survey.BaseSrc):
     freq = None #: Frequency (float)
     rxPair = RxMT
 
+
     def __init__(self, rxList, freq):
+
         self.freq = float(freq)
         Survey.BaseSrc.__init__(self, rxList)