diff --git a/waveform/wrapper_mpv_nosmallexpansion/mpvnosmallwaveform.py b/waveform/wrapper_mpv_nosmallexpansion/mpvnosmallwaveform.py
index 2bc6315047112b10b92f85f6c8ef8af5856a19eb..4b0622c0eb61d95baa8353f5164bf1cd808fab9f 100644
--- a/waveform/wrapper_mpv_nosmallexpansion/mpvnosmallwaveform.py
+++ b/waveform/wrapper_mpv_nosmallexpansion/mpvnosmallwaveform.py
@@ -27,8 +27,8 @@ def gen(**kwds):
     zz = cosmology.redshift(kwds['distance'])
     intz = integrate.quad(integrand_parityamu_mpvinverse, 0, zz)[0]
     temp =  kwds['parity_mpvinverse'] * intz / 1e9 / lal.QE_SI * (lal.H_SI / 2 / lal.PI) * lal.PI * lal.PI / lal.H0_SI
-    expminus = np.exp(-1j*temp*hp.sample_frequencies**2)
-    expplus = 1/expplus
+    expminus = numpy.exp(-1j*temp*hp.sample_frequencies**2)
+    expplus = 1/expminus
 
     hp_parity = (hp+1j*hc)*expminus/2 + (hp-1j*hc)*expplus/2
     hc_parity = (hp+1j*hc)*expminus/2j - (hp-1j*hc)*expplus/2j
diff --git a/waveform/wrapper_mpv_nosmallexpansion/setup.py b/waveform/wrapper_mpv_nosmallexpansion/setup.py
index 2e0c8ff59b82d94098178188bf228fd9310e9c20..bcfd28637beb370102c9d2b215d5f910aaaafb29 100644
--- a/waveform/wrapper_mpv_nosmallexpansion/setup.py
+++ b/waveform/wrapper_mpv_nosmallexpansion/setup.py
@@ -16,7 +16,7 @@ setup (
     url = 'http://www.pycbc.org/',
     #download_url = 'https://github.com/gwastro/revchirp/tarball/v%s' % VERSION,
     keywords = ['pycbc', 'signal processing', 'gravitational waves'],
-    py_modules = ['mpvnosmall'],
+    py_modules = ['mpvnosmallwaveform'],
     entry_points = {"pycbc.waveform.fd":"mpvnosmall=mpvnosmallwaveform:gen"},
     classifiers=[
         'Programming Language :: Python',