* Info: Using [gentoo] (https://bugs.gentoo.org/xmlrpc.cgi)
 * Info: Getting attachment 425760
 * Info: Viewing attachment: "fix_fit_gsl_fdfsolver.patch"
diff --git a/qtiplot/src/analysis/Fit.cpp b/qtiplot/src/analysis/Fit.cpp
index 22cb5be..555f21d 100755
--- a/qtiplot/src/analysis/Fit.cpp
+++ b/qtiplot/src/analysis/Fit.cpp
@@ -106,6 +106,7 @@ void Fit::init()
 gsl_multifit_fdfsolver * Fit::fitGSL(gsl_multifit_function_fdf f, int &iterations, int &status)
 {
 	const gsl_multifit_fdfsolver_type *T;
+	gsl_matrix *J;
 	if (d_solver)
 		T = gsl_multifit_fdfsolver_lmder;
 	else
@@ -128,7 +129,8 @@ gsl_multifit_fdfsolver * Fit::fitGSL(gsl_multifit_function_fdf f, int &iteration
 	}
 
 	if (status){
-	    gsl_multifit_covar (s->J, 0.0, covar);
+	    gsl_multifit_fdfsolver_jac (s, J);
+	    gsl_multifit_covar (J, 0.0, covar);
 	    iterations = 0;
 	    return s;
 	}
@@ -155,7 +157,8 @@ gsl_multifit_fdfsolver * Fit::fitGSL(gsl_multifit_function_fdf f, int &iteration
 		status = gsl_multifit_test_delta (s->dx, s->x, d_tolerance, d_tolerance);
 	} while (inRange && status == GSL_CONTINUE && (int)iter < d_max_iterations);
 
-	gsl_multifit_covar (s->J, 0.0, covar);
+	gsl_multifit_fdfsolver_jac (s, J);
+	gsl_multifit_covar (J, 0.0, covar);
 
 	iterations = iter;
 	return s;