diff --git a/llvm/lib/TextAPI/InterfaceFile.cpp b/llvm/lib/TextAPI/InterfaceFile.cpp
index efbf33b74776e..ce2feb65c9ec9 100644
--- a/llvm/lib/TextAPI/InterfaceFile.cpp
+++ b/llvm/lib/TextAPI/InterfaceFile.cpp
@@ -172,6 +172,7 @@ InterfaceFile::merge(const InterfaceFile *O) const {
 
   IF->setTwoLevelNamespace(isTwoLevelNamespace());
   IF->setApplicationExtensionSafe(isApplicationExtensionSafe());
+  IF->setOSLibNotForSharedCache(isOSLibNotForSharedCache());
 
   for (const auto &It : umbrellas()) {
     if (!It.second.empty())
@@ -238,6 +239,8 @@ InterfaceFile::remove(Architecture Arch) const {
       return make_error<TextAPIError>(TextAPIErrorCode::NoSuchArchitecture);
   }
 
+  // FIXME: Figure out how to keep these attributes in sync when new ones are
+  // added.
   std::unique_ptr<InterfaceFile> IF(new InterfaceFile());
   IF->setFileType(getFileType());
   IF->setPath(getPath());
@@ -248,6 +251,7 @@ InterfaceFile::remove(Architecture Arch) const {
   IF->setSwiftABIVersion(getSwiftABIVersion());
   IF->setTwoLevelNamespace(isTwoLevelNamespace());
   IF->setApplicationExtensionSafe(isApplicationExtensionSafe());
+  IF->setOSLibNotForSharedCache(isOSLibNotForSharedCache());
   for (const auto &It : umbrellas())
     if (It.first.Arch != Arch)
       IF->addParentUmbrella(It.first, It.second);
@@ -316,6 +320,7 @@ InterfaceFile::extract(Architecture Arch) const {
   IF->setSwiftABIVersion(getSwiftABIVersion());
   IF->setTwoLevelNamespace(isTwoLevelNamespace());
   IF->setApplicationExtensionSafe(isApplicationExtensionSafe());
+  IF->setOSLibNotForSharedCache(isOSLibNotForSharedCache());
   for (const auto &It : umbrellas())
     if (It.first.Arch == Arch)
       IF->addParentUmbrella(It.first, It.second);
diff --git a/llvm/unittests/TextAPI/TextStubV5Tests.cpp b/llvm/unittests/TextAPI/TextStubV5Tests.cpp
index 62fdd79ae4970..24577b3ec6148 100644
--- a/llvm/unittests/TextAPI/TextStubV5Tests.cpp
+++ b/llvm/unittests/TextAPI/TextStubV5Tests.cpp
@@ -2077,7 +2077,8 @@ TEST(TBDv5, RemoveIF) {
             "x86_64-macos"
         ],
       "attributes": [
-            "flat_namespace"
+            "flat_namespace",
+            "not_for_dyld_shared_cache"
         ]
     }
   ],
@@ -2242,6 +2243,7 @@ TEST(TBDv5, RemoveIF) {
   EXPECT_EQ(PackedVersion(1, 2, 0), RemovedFile->getCurrentVersion());
   EXPECT_EQ(PackedVersion(1, 1, 0), RemovedFile->getCompatibilityVersion());
   EXPECT_TRUE(RemovedFile->isApplicationExtensionSafe());
+  EXPECT_TRUE(RemovedFile->isOSLibNotForSharedCache());
   EXPECT_FALSE(RemovedFile->isTwoLevelNamespace());
   EXPECT_EQ(0U, RemovedFile->documents().size());