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diff --git a/src/main/java/org/apache/commons/math3/optim/nonlinear/vector/ModelFunctionJacobian.java b/src/main/java/org/apache/commons/math3/optim/nonlinear/vector/ModelFunctionJacobian.java
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+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.commons.math3.optim.nonlinear.vector;
+
+import org.apache.commons.math3.analysis.MultivariateMatrixFunction;
+import org.apache.commons.math3.optim.OptimizationData;
+
+/**
+ * Jacobian of the model (vector) function to be optimized.
+ *
+ * @since 3.1
+ * @deprecated All classes and interfaces in this package are deprecated.
+ * The optimizers that were provided here were moved to the
+ * {@link org.apache.commons.math3.fitting.leastsquares} package
+ * (cf. MATH-1008).
+ */
+@Deprecated
+public class ModelFunctionJacobian implements OptimizationData {
+    /** Function to be optimized. */
+    private final MultivariateMatrixFunction jacobian;
+
+    /**
+     * @param j Jacobian of the model function to be optimized.
+     */
+    public ModelFunctionJacobian(MultivariateMatrixFunction j) {
+        jacobian = j;
+    }
+
+    /**
+     * Gets the Jacobian of the model function to be optimized.
+     *
+     * @return the model function Jacobian.
+     */
+    public MultivariateMatrixFunction getModelFunctionJacobian() {
+        return jacobian;
+    }
+}