diff --git a/OutputShapeUtils.hpp b/OutputShapeUtils.hpp
index f314252..6e2a76d 100644
--- a/OutputShapeUtils.hpp
+++ b/OutputShapeUtils.hpp
@@ -10,6 +10,8 @@
 namespace armnn_driver
 {
 
+bool IsDynamicOutput(const armnn::TensorInfo& outputInfo);
+
 armnn::TensorShape InferPreluOutputShape(const armnn::TensorShape& inputShape, const armnn::TensorShape& alphaShape);
 
 } // namespace armnn_driver