diff --git a/python/ql/lib/semmle/python/frameworks/Multidict.qll b/python/ql/lib/semmle/python/frameworks/Multidict.qll
index 06700e28347..d520757b76f 100644
--- a/python/ql/lib/semmle/python/frameworks/Multidict.qll
+++ b/python/ql/lib/semmle/python/frameworks/Multidict.qll
@@ -9,6 +9,7 @@ private import semmle.python.dataflow.new.TaintTracking
 private import semmle.python.Concepts
 private import semmle.python.ApiGraphs
 private import semmle.python.frameworks.internal.InstanceTaintStepsHelper
+private import semmle.python.frameworks.data.ModelsAsData
 
 /**
  * INTERNAL: Do not use.
@@ -28,6 +29,8 @@ module Multidict {
     /** Gets a reference to a `MultiDictProxy` class. */
     API::Node classRef() {
       result = API::moduleImport("multidict").getMember(["MultiDictProxy", "CIMultiDictProxy"])
+      or
+      result = ModelOutput::getATypeNode("multidict.MultiDictProxy~Subclass").getASubclass*()
     }
 
     /**
diff --git a/python/ql/src/meta/ClassHierarchy/Find.ql b/python/ql/src/meta/ClassHierarchy/Find.ql
index 9883a034cf8..173a111d7fb 100644
--- a/python/ql/src/meta/ClassHierarchy/Find.ql
+++ b/python/ql/src/meta/ClassHierarchy/Find.ql
@@ -21,6 +21,7 @@ private import semmle.python.frameworks.Fabric
 private import semmle.python.frameworks.Httpx
 private import semmle.python.frameworks.Invoke
 private import semmle.python.frameworks.MarkupSafe
+private import semmle.python.frameworks.Multidict
 import semmle.python.frameworks.data.internal.ApiGraphModelsExtensions as Extensions
 
 class FlaskViewClasses extends FindSubclassesSpec {
@@ -310,6 +311,12 @@ class MarkupSafe extends FindSubclassesSpec {
   override API::Node getAlreadyModeledClass() { result = MarkupSafeModel::Markup::classRef() }
 }
 
+class Multidict extends FindSubclassesSpec {
+  Multidict() { this = "multidict.MultiDictProxy~Subclass" }
+
+  override API::Node getAlreadyModeledClass() { result = Multidict::MultiDictProxy::classRef() }
+}
+
 bindingset[fullyQualified]
 predicate fullyQualifiedToYamlFormat(string fullyQualified, string type2, string path) {
   exists(int firstDot | firstDot = fullyQualified.indexOf(".", 0, 0) |