Index: clang-3.4/lib/Basic/Targets.cpp
===================================================================
--- clang-3.4/lib/Basic/Targets.cpp
+++ clang-3.4/lib/Basic/Targets.cpp
@@ -3061,7 +3061,7 @@
 public:
   WindowsX86_32TargetInfo(const llvm::Triple &Triple)
       : WindowsTargetInfo<X86_32TargetInfo>(Triple) {
-    TLSSupported = false;
+    TLSSupported = true;
     WCharType = UnsignedShort;
     DoubleAlign = LongLongAlign = 64;
     DescriptionString = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-"
@@ -3286,7 +3286,7 @@
 public:
   WindowsX86_64TargetInfo(const llvm::Triple &Triple)
       : WindowsTargetInfo<X86_64TargetInfo>(Triple) {
-    TLSSupported = false;
+    TLSSupported = true;
     WCharType = UnsignedShort;
     LongWidth = LongAlign = 32;
     DoubleAlign = LongLongAlign = 64;