diff --git a/PWGUD/Tasks/flowCumulantsUpc.cxx b/PWGUD/Tasks/flowCumulantsUpc.cxx
index e7ccfdb51e4..19f29620a21 100644
--- a/PWGUD/Tasks/flowCumulantsUpc.cxx
+++ b/PWGUD/Tasks/flowCumulantsUpc.cxx
@@ -738,13 +738,13 @@ struct FlowCumulantsUpc {
       registry.fill(HIST("neutronClass"), 0, 0);
     }
     if (std::abs(timeZNA) <= cfgZdcTimeCut && std::abs(timeZNC) > cfgZdcTimeCut) {
-      neutronClass = 1;
-      registry.fill(HIST("neutronClass"), 0, 1);
-    }
-    if (std::abs(timeZNA) > cfgZdcTimeCut && std::abs(timeZNC) <= cfgZdcTimeCut) {
       neutronClass = 2;
       registry.fill(HIST("neutronClass"), 1, 0);
     }
+    if (std::abs(timeZNA) > cfgZdcTimeCut && std::abs(timeZNC) <= cfgZdcTimeCut) {
+      neutronClass = 1;
+      registry.fill(HIST("neutronClass"), 0, 1);
+    }
     if (std::abs(timeZNA) <= cfgZdcTimeCut && std::abs(timeZNC) <= cfgZdcTimeCut) {
       neutronClass = 3;
       registry.fill(HIST("neutronClass"), 1, 1);