diff --git a/waveform/wrapper_mpv_waveform/mpvwaveform.py b/waveform/wrapper_mpv_waveform/mpvwaveform.py
index 8f9664abf08a9bd4c7e03dfef4cfff9e1eeba5e8..fa04e33101e089e8e35913c238e66279adbd88d4 100644
--- a/waveform/wrapper_mpv_waveform/mpvwaveform.py
+++ b/waveform/wrapper_mpv_waveform/mpvwaveform.py
@@ -15,6 +15,7 @@ def gen(**kwds):
     from pycbc.waveform import get_fd_waveform
     from pycbc import cosmology
     import lal
+    from scipy import integrate
     #print(kwds)
 
     if 'approximant' in kwds: