diff --git a/includes/tab.h b/includes/tab.h
index cede5f382478f1f82bf83e9a50a8cbc0ff35eb92..7fbdfa645dc334b2e7df0da592687189d37da59b 100644
--- a/includes/tab.h
+++ b/includes/tab.h
@@ -43,6 +43,7 @@ class Materiaux
 
 };
 
+vector<double> sum_vect(vector <double> T,vector <double> F);
 vector<double> resolution(double lambda, vector<double> T);
 void settab(Materiaux mat, int u0, double f);
 void settab2D(Materiaux mat, int u0, double f);