diff --git a/PeakOTron.py b/PeakOTron.py
index bbe20ffefb65233c547d6504041301994a284a47..3f1cbaa908292d81a2c183173fbd6987698f149f 100644
--- a/PeakOTron.py
+++ b/PeakOTron.py
@@ -694,7 +694,8 @@ class PeakOTron:
         pfs = np.expand_dims(np.asarray(pfs), -1)
         phs = np.expand_dims(np.asarray(phs), -1)
         y_dark = np.sum(fs*pfs, axis=0) + np.sum(hs*phs, axis=0)
-        y_dark = y_dark/np.trapz(h, dx = 1)
+        #y_dark = y_dark/np.trapz(h, dx = 1)
+        y_dark = y_dark/np.trapz(y_dark, dx = 1)
 
 
         y_model = convolve(y_dark,