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diff --git a/src/cpu/operators/CpuFlatten.h b/src/cpu/operators/CpuFlatten.h
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+/*
+ * Copyright (c) 2021, 2023 Arm Limited.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef ACL_SRC_CPU_OPERATORS_CPUFLATTEN_H
+#define ACL_SRC_CPU_OPERATORS_CPUFLATTEN_H
+
+#include "src/cpu/ICpuOperator.h"
+
+namespace arm_compute
+{
+namespace cpu
+{
+class CpuReshape;
+/** Basic function to flatten a given input */
+class CpuFlatten : public ICpuOperator
+{
+public:
+    /** Constructor */
+    CpuFlatten();
+    /** Destructor */
+    ~CpuFlatten();
+    /** Configure operator for a given list of arguments
+     *
+     * Valid data layouts:
+     * - All
+     *
+     * Valid data type configurations:
+     * |src            |dst            |
+     * |:--------------|:--------------|
+     * |All            |All            |
+     *
+     * @param[in] src Source tensor to flatten with at least 3 dimensions.
+     *                The dimensions above the third will be interpreted as batches. Data types supported: All
+     * @param[in] dst Destination tensor with shape [w*h*d, input_batches] where:
+     *                            w = width input tensor, h = height input tensor and d = depth input tensor.
+     *                            Data type supported: same as @p src
+     */
+    void configure(const ITensorInfo *src, ITensorInfo *dst);
+    /** Static function to check if given info will lead to a valid configuration
+     *
+     * Similar to @ref CpuFlatten::configure()
+     *
+     * @return a status
+     */
+    static Status validate(const ITensorInfo *src, const ITensorInfo *dst);
+
+    // Inherited methods overridden:
+    void run(ITensorPack &tensors) override;
+
+private:
+    std::unique_ptr<CpuReshape> _reshape;
+};
+} // namespace cpu
+} // namespace arm_compute
+#endif // ACL_SRC_CPU_OPERATORS_CPUFLATTEN_H