diff --git a/cpp/ql/src/Security/CWE/CWE-120/UnboundedWrite.ql b/cpp/ql/src/Security/CWE/CWE-120/UnboundedWrite.ql
index 4d33ede9315..8cb0122b668 100644
--- a/cpp/ql/src/Security/CWE/CWE-120/UnboundedWrite.ql
+++ b/cpp/ql/src/Security/CWE/CWE-120/UnboundedWrite.ql
@@ -122,7 +122,8 @@ module Config implements DataFlow::ConfigSig {
 
   predicate isBarrier(DataFlow::Node node) {
     // Block flow if the node is guarded by any <, <= or = operations.
-    node = DataFlow::BarrierGuard<lessThanOrEqual/3>::getABarrierNode()
+    node = DataFlow::BarrierGuard<lessThanOrEqual/3>::getABarrierNode() or
+    node = DataFlow::BarrierGuard<lessThanOrEqual/3>::getAnIndirectBarrierNode()
   }
 
   predicate observeDiffInformedIncrementalMode() { any() }