diff --git a/src/Generator/Generators/CSharp/CSharpSources.cs b/src/Generator/Generators/CSharp/CSharpSources.cs
index 0d853b16..b35b8449 100644
--- a/src/Generator/Generators/CSharp/CSharpSources.cs
+++ b/src/Generator/Generators/CSharp/CSharpSources.cs
@@ -333,7 +333,7 @@ namespace CppSharp.Generators.CSharp
             foreach (var specialization in generated.KeepSingleAllPointersSpecialization())
                 GenerateClassInternals(specialization);
 
-            foreach (var group in generated.SelectMany(s => s.Classes).Where(
+            foreach (var group in specializations.SelectMany(s => s.Classes).Where(
                 c => !c.IsIncomplete).GroupBy(c => c.Name))
             {
                 var nested = classTemplate.Classes.FirstOrDefault(c => c.Name == group.Key);
diff --git a/tests/CSharp/CSharpTemplates.h b/tests/CSharp/CSharpTemplates.h
index f5472600..bdb843fa 100644
--- a/tests/CSharp/CSharpTemplates.h
+++ b/tests/CSharp/CSharpTemplates.h
@@ -85,6 +85,11 @@ class IndependentFields : public T1
 {
     typedef T Type;
 public:
+    class Nested
+    {
+    private:
+        T field;
+    };
     IndependentFields();
     IndependentFields(const IndependentFields<T>& other);
     IndependentFields(const T& t);