diff --git a/tests/validation/reference/PoolingLayer.h b/tests/validation/reference/PoolingLayer.h
index 1c0b7ff..fc36d51 100644
--- a/tests/validation/reference/PoolingLayer.h
+++ b/tests/validation/reference/PoolingLayer.h
@@ -35,6 +35,8 @@
 {
 namespace reference
 {
+template <typename T, typename ACC_T = T, typename std::enable_if<is_floating_point<T>::value, int>::type = 0>
+SimpleTensor<T> pooling_layer_internal(const SimpleTensor<T> &src, const PoolingLayerInfo &info, const QuantizationInfo &output_qinfo);
 template <typename T>
 SimpleTensor<T> pooling_layer(const SimpleTensor<T> &src, const PoolingLayerInfo &info, const QuantizationInfo &output_qinfo);
 } // namespace reference