diff --git a/llvm/tools/llvm-ifs/llvm-ifs.cpp b/llvm/tools/llvm-ifs/llvm-ifs.cpp
--- a/llvm/tools/llvm-ifs/llvm-ifs.cpp
+++ b/llvm/tools/llvm-ifs/llvm-ifs.cpp
@@ -236,15 +236,32 @@
     }
   }(T);
 
+  auto PlatformKindOrError =
+      [](const llvm::Triple &T) -> llvm::Expected<llvm::MachO::PlatformKind> {
+    if (T.isiOS())
+      return llvm::MachO::PlatformKind::iOS;
+    if (T.isMacOSX())
+      return llvm::MachO::PlatformKind::macOS;
+    if (T.isTvOS())
+      return llvm::MachO::PlatformKind::tvOS;
+    if (T.isWatchOS())
+      return llvm::MachO::PlatformKind::watchOS;
+    return createStringError(errc::not_supported, "Invalid Platform.");
+  }(T);
+
   if (!ArchOrError)
     return -1;
 
+  if (!PlatformKindOrError)
+    return -1;
+
   Architecture Arch = ArchOrError.get();
+  PlatformKind Plat = PlatformKindOrError.get();
 
   InterfaceFile File;
   File.setFileType(FileType::TBD_V3);
   File.setArchitectures(Arch);
-  File.setPlatform(PlatformKind::macOS);
+  File.setPlatform(Plat);
 
   for (const auto &Symbol : Symbols) {
     auto Name = Symbol.Name;