diff --git a/subcritical_flow_channel_into_reservoir.py b/subcritical_flow_channel_into_reservoir.py
index 837365872143c781b09ca2af7a9be91cb087fc75..dfb20ee1084835b0d9d13a0882bd0b77cec3f610 100644
--- a/subcritical_flow_channel_into_reservoir.py
+++ b/subcritical_flow_channel_into_reservoir.py
@@ -129,12 +129,12 @@ def update_from_sliders(val):
         plot_H.set_data(x, H)
         plot_fb = ax_profile.fill_between(x, y1=zf, y2=zsl, color="lightblue", alpha=0.75)
 
-        fig.suptitle(f'profil en long // longitudinal profile, K={val:.2f}')
+        fig.suptitle(f'profil en long // longitudinal profile, K={K_slider:.2f}')
     else:
         # on n'a pas pu calculer
         plot_zsl.set_data(x0, h0)
         plot_H.set_data(x0, h0)
-        fig.suptitle(f'profil en long, K={val:.2f} ; calcul impossible')
+        fig.suptitle(f'profil en long, K={K_slider:.2f} ; calcul impossible')
 
         if hn < h_critique:
             # print('le rÊgime uniforme doit ÃĒtre fluvial : calcul impossible.')