diff --git a/mysignal/phasefreq.py b/mysignal/phasefreq.py
index 1860eec..1b78605 100644
--- a/mysignal/phasefreq.py
+++ b/mysignal/phasefreq.py
@@ -9,7 +9,7 @@ from scipy.stats import linregress
 from scipy.optimize import curve_fit
 
 
-def filter_signal_by_modes(time, signal, num_modes=1, bandwidth_factor=0.1,required_cycles=40):
+def filter_signal_by_modes(time, signal, num_modes=1, bandwidth_factor=0.1, required_cycles=40):
     """
     Filtre un signal pour extraire ses composantes fréquentielles dominantes.