diff --git a/lib/ClangImporter/CFTypeInfo.cpp b/lib/ClangImporter/CFTypeInfo.cpp
index dd9128f676b97..cf31fa220e007 100644
--- a/lib/ClangImporter/CFTypeInfo.cpp
+++ b/lib/ClangImporter/CFTypeInfo.cpp
@@ -53,6 +53,9 @@ CFPointeeInfo
 CFPointeeInfo::classifyTypedef(const clang::TypedefNameDecl *typedefDecl) {
   clang::QualType type = typedefDecl->getUnderlyingType();
 
+  if (auto elaborated = type->getAs<clang::ElaboratedType>())
+    type = elaborated->desugar();
+
   if (auto subTypedef = type->getAs<clang::TypedefType>()) {
     if (classifyTypedef(subTypedef->getDecl()))
       return forTypedef(subTypedef->getDecl());
diff --git a/test/Interop/Cxx/objc-correctness/Inputs/NSTextCheckingResult.h b/test/Interop/Cxx/objc-correctness/Inputs/NSTextCheckingResult.h
new file mode 100644
index 0000000000000..4cc986d089920
--- /dev/null
+++ b/test/Interop/Cxx/objc-correctness/Inputs/NSTextCheckingResult.h
@@ -0,0 +1,12 @@
+#define __CF_OPTIONS_ATTRIBUTES __attribute__((flag_enum,enum_extensibility(open)))
+#if (__cplusplus)
+#define CF_OPTIONS(_type, _name) __attribute__((availability(swift,unavailable))) _type _name; enum __CF_OPTIONS_ATTRIBUTES : _name
+#else
+#define CF_OPTIONS(_type, _name) enum __CF_OPTIONS_ATTRIBUTES _name : _type _name; enum _name : _type
+#endif
+
+typedef CF_OPTIONS(unsigned int, NSTextCheckingType) {
+  NSTextCheckingTypeOrthography           = 1ULL << 0,
+  NSTextCheckingTypeSpelling              = 1ULL << 1,
+  // ...
+};
diff --git a/test/Interop/Cxx/objc-correctness/Inputs/SwiftTextCheckingResult.swift b/test/Interop/Cxx/objc-correctness/Inputs/SwiftTextCheckingResult.swift
new file mode 100644
index 0000000000000..851c02ebc6fe7
--- /dev/null
+++ b/test/Interop/Cxx/objc-correctness/Inputs/SwiftTextCheckingResult.swift
@@ -0,0 +1,5 @@
+import NSTextCheckingResult
+
+public func foo() -> NSTextCheckingType {
+  return .orthography
+}
diff --git a/test/Interop/Cxx/objc-correctness/Inputs/module.modulemap b/test/Interop/Cxx/objc-correctness/Inputs/module.modulemap
index 47908d93fed08..2189df2a3f8fd 100644
--- a/test/Interop/Cxx/objc-correctness/Inputs/module.modulemap
+++ b/test/Interop/Cxx/objc-correctness/Inputs/module.modulemap
@@ -24,3 +24,8 @@ module OSObject {
   requires objc
   requires cplusplus
 }
+
+module NSTextCheckingResult {
+  header "NSTextCheckingResult.h"
+  requires objc
+}
diff --git a/test/Interop/Cxx/objc-correctness/foundation-string-extensions.swift b/test/Interop/Cxx/objc-correctness/foundation-string-extensions.swift
new file mode 100644
index 0000000000000..b035fcbb1ba01
--- /dev/null
+++ b/test/Interop/Cxx/objc-correctness/foundation-string-extensions.swift
@@ -0,0 +1,11 @@
+// RUN: %empty-directory(%t)
+// RUN: %target-swift-frontend %S/Inputs/SwiftTextCheckingResult.swift -I %S/Inputs -module-name SwiftTextCheckingResult -enable-objc-interop -emit-module -emit-module-path %t/SwiftTextCheckingResult.swiftmodule
+// RUN: %target-typecheck-verify-swift -verify-ignore-unknown -I %t -I %S/Inputs -module-name SwiftTest -enable-objc-interop -enable-experimental-cxx-interop
+
+// REQUIRES: objc_interop
+
+import SwiftTextCheckingResult
+
+let _ = foo()
+
+// CHECK: @"$sSy10FoundationE20replacingOccurrences2of4with7options5rangeSSqd___qd_0_So22NSStringCompareOptionsVSnySS5IndexVGSgtSyRd__SyRd_0_r0_lF"