diff --git a/Matlab-Programs/compute_F.m b/Matlab-Programs/compute_F.m
index 079055e9dc4bc7632a34b4abf320cc7ee7871e85..322299cf3e793a89cce31cdd60a5677faa14291e 100755
--- a/Matlab-Programs/compute_F.m
+++ b/Matlab-Programs/compute_F.m
@@ -23,7 +23,7 @@ r = L./Q;
 
 
 % F = r.^2.*Q - 2.*r.*trace(L'*B)
-F = (r.^2).*Q - 2.*r.*L
+F = (r.^2).*Q - 2.*r.*L;
 
 
 end