diff --git a/csharp/ql/lib/semmle/code/csharp/controlflow/internal/ControlFlowGraph.qll b/csharp/ql/lib/semmle/code/csharp/controlflow/internal/ControlFlowGraph.qll
index 18a967eee28..072f611a45a 100644
--- a/csharp/ql/lib/semmle/code/csharp/controlflow/internal/ControlFlowGraph.qll
+++ b/csharp/ql/lib/semmle/code/csharp/controlflow/internal/ControlFlowGraph.qll
@@ -145,6 +145,8 @@ module Ast implements AstSig<Location> {
   final private class ParameterFinal = CS::Parameter;
 
   class Parameter extends ParameterFinal {
+    AstNode getPattern() { result = this }
+
     Expr getDefaultValue() {
       // Avoid combinatorial explosions for callables with multiple bodies
       result = unique( | | super.getDefaultValue())
diff --git a/java/ql/lib/semmle/code/java/ControlFlowGraph.qll b/java/ql/lib/semmle/code/java/ControlFlowGraph.qll
index 51f3046e1bf..142f9f61e56 100644
--- a/java/ql/lib/semmle/code/java/ControlFlowGraph.qll
+++ b/java/ql/lib/semmle/code/java/ControlFlowGraph.qll
@@ -61,6 +61,8 @@ private module Ast implements AstSig<Location> {
   class Parameter extends AstNode {
     Parameter() { none() }
 
+    AstNode getPattern() { none() }
+
     Expr getDefaultValue() { none() }
   }