diff --git a/RecoParticleFlow/PFClusterProducer/plugins/alpaka/PFClusterSoAProducerKernel.dev.cc b/RecoParticleFlow/PFClusterProducer/plugins/alpaka/PFClusterSoAProducerKernel.dev.cc
index ea7816ce0cb87..80ab1329d0730 100644
--- a/RecoParticleFlow/PFClusterProducer/plugins/alpaka/PFClusterSoAProducerKernel.dev.cc
+++ b/RecoParticleFlow/PFClusterProducer/plugins/alpaka/PFClusterSoAProducerKernel.dev.cc
@@ -1380,17 +1380,17 @@ namespace ALPAKA_ACCELERATOR_NAMESPACE {
             clusterView[seedIdx].y() = pfRecHits[rhIdx].y();
             clusterView[seedIdx].z() = pfRecHits[rhIdx].z();
           }
-        } else if constexpr (!std::is_same_v<Device, alpaka::DevCpu>) {
           // singleSeed and multiSeedParallel functions work only for GPU backend
-          if (nSeeds == 1) {
-            // Single seed cluster
-            hcalFastCluster_singleSeed(
-                acc, pfClusParams, topology, topoId, nRHTopo, pfRecHits, pfClusteringVars, clusterView, fracView);
-          } else if (nSeeds <= 100 && nRHTopo - nSeeds < threadsPerBlockForClustering) {
-            hcalFastCluster_multiSeedParallel(
-                acc, pfClusParams, topology, topoId, nSeeds, nRHTopo, pfRecHits, pfClusteringVars, clusterView, fracView);
-          }
+        } else if ((not std::is_same_v<Device, alpaka::DevCpu>)&&nSeeds == 1) {
+          // Single seed cluster
+          hcalFastCluster_singleSeed(
+              acc, pfClusParams, topology, topoId, nRHTopo, pfRecHits, pfClusteringVars, clusterView, fracView);
+        } else if ((not std::is_same_v<Device, alpaka::DevCpu>)&&nSeeds <= 100 &&
+                   nRHTopo - nSeeds < threadsPerBlockForClustering) {
+          hcalFastCluster_multiSeedParallel(
+              acc, pfClusParams, topology, topoId, nSeeds, nRHTopo, pfRecHits, pfClusteringVars, clusterView, fracView);
         } else if (nSeeds <= 400 && nRHTopo - nSeeds <= 1500) {
+          // nSeeds value must match exotic in FastClusterExotic
           hcalFastCluster_multiSeedIterative(
               acc, pfClusParams, topology, topoId, nSeeds, nRHTopo, pfRecHits, pfClusteringVars, clusterView, fracView);
         } else {
@@ -1429,7 +1429,8 @@ namespace ALPAKA_ACCELERATOR_NAMESPACE {
         int nRHTopo = pfClusteringVars[topoId].topoRHCount();
         int nSeeds = pfClusteringVars[topoId].topoSeedCount();
 
-        if (nRHTopo > 0 && nSeeds > 400 && nRHTopo - nSeeds > 1500) {
+        // nSeeds value must match multiSeedIterative in FastCluster
+        if (nRHTopo > 0 && (nSeeds > 400 || nRHTopo - nSeeds > 1500)) {
           hcalFastCluster_exotic(acc,
                                  pfClusParams,
                                  topology,