diff --git a/src/data/DamarisFFT.py b/src/data/DamarisFFT.py
index 5924907..ce72c2e 100644
--- a/src/data/DamarisFFT.py
+++ b/src/data/DamarisFFT.py
@@ -82,7 +82,7 @@ class DamarisFFT:
         """
         exponential window
         """
-                apod = numpy.exp(-self.x*numpy.pi*line_broadening)
+        apod = numpy.exp(-self.x*numpy.pi*line_broadening)
         for i in range(2):
             self.y[i] = self.y[i]*apod
         return self