diff --git a/ethosu/regor/compiler/network_performance.cpp b/ethosu/regor/compiler/network_performance.cpp
index 1567a43a7009eebda14f8e01b834b0c04b224ef9..67b5047c846e2ccb6627b1baf9ca895acc5e1624 100644
--- a/ethosu/regor/compiler/network_performance.cpp
+++ b/ethosu/regor/compiler/network_performance.cpp
@@ -210,7 +210,10 @@ PerformanceResult NetworkPerformance::Measure(Schedule *schedule, OptimiserDatab
             {
                 AddToDatabase(perf, subOp.get(), cost, opTable, perfDebugTable, memories, optDb);
             }
-            performance += perf;
+            if ( !IsActivation(subOp->Type()) )
+            {
+                performance += perf;
+            }
             prevOp = subOp.get();
             prevCost = cost;
         }