2 files changed, 14 insertions, 2 deletions
diff --git a/src/backends/reference/RefBackend.cpp b/src/backends/reference/RefBackend.cpp
index e4f468c15e..d5f5348642 100644
--- a/src/backends/reference/RefBackend.cpp
+++ b/src/backends/reference/RefBackend.cpp
@@ -73,4 +73,13 @@ IBackendInternal::ILayerSupportSharedPtr RefBackend::GetLayerSupport() const
     return layerSupport;
 }
 
-} // namespace armnn
-\ No newline at end of file
+IBackendInternal::SubGraphUniquePtr RefBackend::OptimizeSubGraph(const SubGraph& subGraph,
+                                                                 bool& optimizationAttempted) const
+{
+    // Not trying to optimize the given sub-graph
+    optimizationAttempted = false;
+
+    return SubGraphUniquePtr{};
+}
+
+} // namespace armnn
diff --git a/src/backends/reference/RefBackend.hpp b/src/backends/reference/RefBackend.hpp
index 51366221c7..6305bf568c 100644
--- a/src/backends/reference/RefBackend.hpp
+++ b/src/backends/reference/RefBackend.hpp
@@ -30,6 +30,9 @@ public:
 
     IBackendInternal::Optimizations GetOptimizations() const override;
     IBackendInternal::ILayerSupportSharedPtr GetLayerSupport() const override;
+
+    IBackendInternal::SubGraphUniquePtr OptimizeSubGraph(const SubGraph& subGraph,
+                                                         bool& optimizationAttempted) const override;
 };
 
-} // namespace armnn
-\ No newline at end of file
+} // namespace armnn