diff --git a/GPU/GPUTracking/Global/GPUChainTrackingClusterizer.cxx b/GPU/GPUTracking/Global/GPUChainTrackingClusterizer.cxx
index 6c4e60a6025e1..64e6f5a31aaa7 100644
--- a/GPU/GPUTracking/Global/GPUChainTrackingClusterizer.cxx
+++ b/GPU/GPUTracking/Global/GPUChainTrackingClusterizer.cxx
@@ -1198,6 +1198,7 @@ int32_t GPUChainTracking::RunTPCClusterizer(bool synchronizeOutput)
     }
   }
   for (int32_t i = 0; i < GetProcessingSettings().nTPCClustererLanes; i++) {
+#ifdef GPUCA_HAS_ONNX
     if (GetProcessingSettings().nn.applyNNclusterizer) {
       LOG(info) << "(ORT) Environment releasing...";
       GPUTPCNNClusterizerHost& nnApplication = nnApplications[i];
@@ -1205,6 +1206,7 @@ int32_t GPUChainTracking::RunTPCClusterizer(bool synchronizeOutput)
       nnApplication.mModelReg1.release(true);
       nnApplication.mModelReg2.release(true);
     }
+#endif
     if (transferRunning[i]) {
       ReleaseEvent(mEvents->stream[i], doGPU);
     }