diff --git a/packages/pyright-scip/snapshots/output/single_function/src/single_function.py b/packages/pyright-scip/snapshots/output/single_function/src/single_function.py
index d8b46e233..0b95dc4f4 100644
--- a/packages/pyright-scip/snapshots/output/single_function/src/single_function.py
+++ b/packages/pyright-scip/snapshots/output/single_function/src/single_function.py
@@ -18,10 +18,10 @@ def my_cool_function_2(a: str):
     x = ", world"
 #   ^ definition local 1
     return (lambda y: a + x + y)("oh no")
-#                  ^ definition local 2(y)
+#                  ^ definition local 3
 #                     ^ reference  snapshot-util 0.1 `src.single_function`/my_cool_function_2().(a)
 #                         ^ reference local 1
-#                             ^ reference local 2(y)
+#                             ^ reference local 3
 
 def next_level():
 #   ^^^^^^^^^^ definition  snapshot-util 0.1 `src.single_function`/next_level().
diff --git a/packages/pyright-scip/src/treeVisitor.ts b/packages/pyright-scip/src/treeVisitor.ts
index 69115d90e..488cb3e55 100644
--- a/packages/pyright-scip/src/treeVisitor.ts
+++ b/packages/pyright-scip/src/treeVisitor.ts
@@ -1090,8 +1090,15 @@ export class TreeVisitor extends ParseTreeWalker {
                     log.debug('Paramerter with no name', node);
                     return ScipSymbol.local(this.counter.next());
                 }
+                // If the parent is a lambda, we can't generate a legal symbol
+                // by appending a descriptor; the parameter needs to be a local
+                // too.
+                const parentSymbol = this.getScipSymbol(node.parent!);
+                if (parentSymbol.isLocal()) {
+                    return ScipSymbol.local(this.counter.next());
+                }
 
-                return Symbols.makeParameter(this.getScipSymbol(node.parent!), node.name.value);
+                return Symbols.makeParameter(parentSymbol, node.name.value);
             }
             case ParseNodeType.Class: {
                 return Symbols.makeType(this.getScipSymbol(node.parent!), (node as ClassNode).name.value);