diff --git a/ethosu/regor/compiler/tflite_graph_optimiser.cpp b/ethosu/regor/compiler/tflite_graph_optimiser.cpp
index 0b3e3de9dcdcd861c9aad66da17df8760bf5755d..0a4e6b50ccf09a1fe59eba6ab6cb24d5c4032c9a 100644
--- a/ethosu/regor/compiler/tflite_graph_optimiser.cpp
+++ b/ethosu/regor/compiler/tflite_graph_optimiser.cpp
@@ -2797,9 +2797,13 @@ Operation *TFLiteGraphOptimiser::ConvertZeroPoint(Graph *const graph, Operation
 {
     UNUSED(graph);
     auto opType = operation->Type();
+    if ( opType == OpType::Passthrough )
+    {
+        return operation;
+    }
+
     bool zeroPoint0ForType =
         opType == OpType::AvgPool || opType == OpType::Resize || opType == OpType::CLZ || opType == OpType::SHL || opType == OpType::Div;
-
     for ( auto [usage, ifmConn] : operation->Inputs().pairs() )
     {
         if ( IsIFM(usage) )