diff --git a/dingo/fba.py b/dingo/fba.py
index 8a6cbf7f..cba061f0 100644
--- a/dingo/fba.py
+++ b/dingo/fba.py
@@ -13,7 +13,7 @@
 def slow_fba(lb, ub, S, c):
     """A Python function to perform fba using scipy.optimize LP solver `linprog`
     Returns an optimal solution and its value for the following linear program:
-    min c*v, subject to,
+    max c*v, subject to,
     Sv = 0, lb <= v <= ub
 
     Keyword arguments:
diff --git a/dingo/gurobi_based_implementations.py b/dingo/gurobi_based_implementations.py
index 787b7e2a..42300128 100644
--- a/dingo/gurobi_based_implementations.py
+++ b/dingo/gurobi_based_implementations.py
@@ -107,9 +107,7 @@ def fast_fba(lb, ub, S, c):
                 if status == GRB.OPTIMAL:
                     optimum_value = -model.getObjective().getValue()
                     v = model.getVars()
-
-                for i in range(n):
-                    optimum_sol.append(v[i].x)
+                    optimum_sol = model.getAttr("X", v)
 
                 optimum_sol = np.asarray(optimum_sol)