diff --git a/ql/lib/codeql/actions/dataflow/internal/DataFlowPrivate.qll b/ql/lib/codeql/actions/dataflow/internal/DataFlowPrivate.qll
index 2d77b347348..de88c39c2d5 100644
--- a/ql/lib/codeql/actions/dataflow/internal/DataFlowPrivate.qll
+++ b/ql/lib/codeql/actions/dataflow/internal/DataFlowPrivate.qll
@@ -190,7 +190,7 @@ predicate stepsCtxLocalStep(Node nodeFrom, Node nodeTo) {
  */
 predicate needsCtxLocalStep(Node nodeFrom, Node nodeTo) {
   exists(UsesExpr astFrom, NeedsCtxAccessExpr astTo |
-    externallyDefinedSource(nodeFrom, _, "output." + astTo.getFieldName()) and
+    externallyDefinedSource(nodeFrom, _, "output." + astTo.getFieldName(), _) and
     astFrom = nodeFrom.asExpr() and
     astTo = nodeTo.asExpr() and
     astTo.getRefExpr() = astFrom