diff --git a/fluidsim/solvers/ns2d/strat/output/spatio_temporal_spectra.py b/fluidsim/solvers/ns2d/strat/output/spatio_temporal_spectra.py
index 6d597019875a8574f96c7b26664b5aeba8f1d3a3_Zmx1aWRzaW0vc29sdmVycy9uczJkL3N0cmF0L291dHB1dC9zcGF0aW9fdGVtcG9yYWxfc3BlY3RyYS5weQ==..ed90e0dc5ee3c6388f13dbe4963f77c77ba4c89f_Zmx1aWRzaW0vc29sdmVycy9uczJkL3N0cmF0L291dHB1dC9zcGF0aW9fdGVtcG9yYWxfc3BlY3RyYS5weQ== 100644
--- a/fluidsim/solvers/ns2d/strat/output/spatio_temporal_spectra.py
+++ b/fluidsim/solvers/ns2d/strat/output/spatio_temporal_spectra.py
@@ -24,7 +24,6 @@
 from scipy import signal
 
 from fluiddyn.util import mpi
-from fluiddyn.calcul.easypyfft import FFTW1DReal2Complex
 from fluidsim.base.output.base import SpecificOutput
 
 # Notes