diff --git a/llvm/lib/System/Unix/ThreadLocal.inc b/llvm/lib/System/Unix/ThreadLocal.inc
index 6ee840d..83d554d 100644
--- a/llvm/lib/System/Unix/ThreadLocal.inc
+++ b/llvm/lib/System/Unix/ThreadLocal.inc
@@ -20,6 +20,6 @@
 using namespace sys;
 ThreadLocalImpl::ThreadLocalImpl() { }
 ThreadLocalImpl::~ThreadLocalImpl() { }
-void ThreadLocalImpl::setInstance(void* d) { data = d; }
-void* ThreadLocalImpl::getInstance() { return data; }
-}
\ No newline at end of file
+void ThreadLocalImpl::setInstance(const void* d) { data = const_cast<void*>(d);}
+const void* ThreadLocalImpl::getInstance() { return data; }
+}