diff --git a/csharp/ql/lib/semmle/code/csharp/dataflow/internal/DataFlowPrivate.qll b/csharp/ql/lib/semmle/code/csharp/dataflow/internal/DataFlowPrivate.qll
index f0d4bd99621..d12c65c9fff 100644
--- a/csharp/ql/lib/semmle/code/csharp/dataflow/internal/DataFlowPrivate.qll
+++ b/csharp/ql/lib/semmle/code/csharp/dataflow/internal/DataFlowPrivate.qll
@@ -714,7 +714,7 @@ predicate simpleLocalFlowStep(Node nodeFrom, Node nodeTo, string model) {
   ) and
   model = ""
   or
-  FlowSummaryImpl::Private::Steps::summaryLocalStep(nodeFrom.(FlowSummaryNode).getSummaryNode(),
+  FlowSummaryImpl::Private::Steps::summaryLocalStep(nodeFrom,
     nodeTo.(FlowSummaryNode).getSummaryNode(), true, model)
 }
 
diff --git a/csharp/ql/lib/semmle/code/csharp/dataflow/internal/FlowSummaryImpl.qll b/csharp/ql/lib/semmle/code/csharp/dataflow/internal/FlowSummaryImpl.qll
index a7ab18a6290..f936a206e2b 100644
--- a/csharp/ql/lib/semmle/code/csharp/dataflow/internal/FlowSummaryImpl.qll
+++ b/csharp/ql/lib/semmle/code/csharp/dataflow/internal/FlowSummaryImpl.qll
@@ -34,6 +34,8 @@ module Input implements InputSig<Location, DataFlowImplSpecific::CsharpDataFlow>
 
   class SinkBase = Void;
 
+  class FlowSummaryCallBase = Void;
+
   predicate neutralElement(SummarizedCallableBase c, string kind, string provenance, boolean isExact) {
     interpretNeutral(c, kind, provenance, isExact)
   }
@@ -201,6 +203,10 @@ private module TypesInput implements Impl::Private::TypesInputSig {
 }
 
 private module StepsInput implements Impl::Private::StepsInputSig {
+  Impl::Private::SummaryNode getSummaryNode(Node n) {
+    result = n.(FlowSummaryNode).getSummaryNode()
+  }
+
   DataFlowCall getACall(Public::SummarizedCallable sc) {
     sc = viableCallable(result).asSummarizedCallable()
   }
diff --git a/csharp/ql/lib/semmle/code/csharp/dataflow/internal/TaintTrackingPrivate.qll b/csharp/ql/lib/semmle/code/csharp/dataflow/internal/TaintTrackingPrivate.qll
index d3ae19c6d18..e51eaf4bbcb 100644
--- a/csharp/ql/lib/semmle/code/csharp/dataflow/internal/TaintTrackingPrivate.qll
+++ b/csharp/ql/lib/semmle/code/csharp/dataflow/internal/TaintTrackingPrivate.qll
@@ -171,7 +171,7 @@ private module Cached {
     ) and
     model = ""
     or
-    FlowSummaryImpl::Private::Steps::summaryLocalStep(nodeFrom.(FlowSummaryNode).getSummaryNode(),
+    FlowSummaryImpl::Private::Steps::summaryLocalStep(nodeFrom,
       nodeTo.(FlowSummaryNode).getSummaryNode(), false, model)
   }
 }