diff --git a/IMRPhenomTPHMParity/parity_TPHM.py b/IMRPhenomTPHMParity/parity_TPHM.py
index d2431ed3c60d117762945c565e23311b1a1332ba..009bb1e736cb427ff2d6379a923579db03c5265b 100644
--- a/IMRPhenomTPHMParity/parity_TPHM.py
+++ b/IMRPhenomTPHMParity/parity_TPHM.py
@@ -6,7 +6,7 @@ def gen(**kwds):
         kwds.pop("approximant")
     hp, hc = get_fd_waveform(approximant="IMRPhenomTPHM", **kwds)
 
-    temp =  kwds['parity_Amu'] / 1e9 / lal.QE_SI * lal.H_SI * lal.PI * lal.PI / lal.H0_SI
+    temp =  kwds['parity_amu'] / 1e9 / lal.QE_SI * lal.H_SI * lal.PI * lal.PI / lal.H0_SI
 
     hp_parity = hp + hc * temp * hp.sample_frequencies **2
     hc_parity = hc - hp * temp * hp.sample_frequencies **2