diff --git a/src/Generator/Passes/TrimSpecializationsPass.cs b/src/Generator/Passes/TrimSpecializationsPass.cs
index b9024654d0..e27b7a8cc4 100644
--- a/src/Generator/Passes/TrimSpecializationsPass.cs
+++ b/src/Generator/Passes/TrimSpecializationsPass.cs
@@ -85,9 +85,7 @@ public override bool VisitFieldDecl(Field field)
                 return true;
             }
 
-            TypeMap typeMap;
-            if (!Context.TypeMaps.FindTypeMap(field.Type, out typeMap) &&
-                !ASTUtils.CheckTypeForSpecialization(field.Type,
+            if (!ASTUtils.CheckTypeForSpecialization(field.Type,
                     field, AddSpecialization, Context.TypeMaps))
                 CheckForInternalSpecialization(field, field.Type);
 
diff --git a/tests/VTables/VTables.Tests.cs b/tests/VTables/VTables.Tests.cs
index 9d321116a6..9395f8d8f6 100644
--- a/tests/VTables/VTables.Tests.cs
+++ b/tests/VTables/VTables.Tests.cs
@@ -78,4 +78,15 @@ public void TestVirtualFuntionRetVal()
         var retBase = new ManagedDerivedClassVirtualRetBase();
         TestVirtualFunction(retBase, 10);
     }
+
+    [Test]
+    public void TestStdStringInField()
+    {
+        using (var foo = new Foo())
+        {
+            Assert.That(foo.S, Is.Empty);
+            foo.S = "test";
+            Assert.That(foo.S, Is.EqualTo("test"));
+        }
+    }
 }
diff --git a/tests/VTables/VTables.h b/tests/VTables/VTables.h
index 06f35b5f4a..f223d427b3 100644
--- a/tests/VTables/VTables.h
+++ b/tests/VTables/VTables.h
@@ -1,4 +1,5 @@
 #include "../Tests.h"
+#include <string>
 
 class DLL_API Foo
 {
@@ -15,6 +16,7 @@ class DLL_API Foo
     virtual int append();
     virtual int append(int a);
     int callVirtualWithParameter(int a);
+    std::string s;
 };
 
 DLL_API int FooCallFoo(Foo* foo);