diff --git a/include/llvm/ADT/Triple.h b/include/llvm/ADT/Triple.h
index 57b2bb8c349..49d9f684041 100644
--- a/include/llvm/ADT/Triple.h
+++ b/include/llvm/ADT/Triple.h
@@ -310,6 +310,11 @@ public:
     return getOS() == Triple::Win32 || isOSCygMing();
   }
 
+  /// \brief Tests whether the OS is NaCl (Native Client)
+  bool isOSNaCl() const {
+    return getOS() == Triple::NaCl;
+  }
+
   /// \brief Tests whether the OS uses the ELF binary format.
   bool isOSBinFormatELF() const {
     return !isOSDarwin() && !isOSWindows();