Index: lldb/packages/Python/lldbsuite/test/lang/objc/objc-property/TestObjCProperty.py
===================================================================
--- lldb/packages/Python/lldbsuite/test/lang/objc/objc-property/TestObjCProperty.py
+++ lldb/packages/Python/lldbsuite/test/lang/objc/objc-property/TestObjCProperty.py
@@ -110,6 +110,11 @@
         self.assertTrue(backed_value.GetValueAsUnsigned(12345)
                         == backing_value.GetValueAsUnsigned(23456))
 
+        value_from_typedef = frame.EvaluateExpression("typedefd.backedInt", False)
+        self.assertTrue(value_from_typedef.GetError().Success())
+        self.assertEqual(value_from_typedef.GetValueAsUnsigned(12345),
+                         backing_value.GetValueAsUnsigned(23456))
+
         unbacked_value = frame.EvaluateExpression("mine.unbackedInt", False)
         unbacked_error = unbacked_value.GetError()
         self.assertTrue(unbacked_error.Success())
Index: lldb/packages/Python/lldbsuite/test/lang/objc/objc-property/main.m
===================================================================
--- lldb/packages/Python/lldbsuite/test/lang/objc/objc-property/main.m
+++ lldb/packages/Python/lldbsuite/test/lang/objc/objc-property/main.m
@@ -87,10 +87,13 @@
 }
 @end
 
+typedef BaseClass TypedefBaseClass;
+
 int
 main ()
 {
   BaseClass *mine = [BaseClass baseClassWithBackedInt: 10 andUnbackedInt: 20];
+  TypedefBaseClass *typedefd = mine;
   
   // Set a breakpoint here.
   int nonexistant = mine.nonexistantInt;
Index: lldb/source/Plugins/TypeSystem/Clang/TypeSystemClang.cpp
===================================================================
--- lldb/source/Plugins/TypeSystem/Clang/TypeSystemClang.cpp
+++ lldb/source/Plugins/TypeSystem/Clang/TypeSystemClang.cpp
@@ -4259,8 +4259,7 @@
   if (type) {
     clang::QualType qual_type(GetQualType(type));
 
-    const clang::Type::TypeClass type_class = qual_type->getTypeClass();
-    switch (type_class) {
+    switch (qual_type.getDesugaredType(getASTContext())->getTypeClass()) {
     case clang::Type::ObjCObject:
     case clang::Type::ObjCInterface:
       return GetType(getASTContext().getObjCObjectPointerType(qual_type));