diff --git a/llvm/lib/Support/Windows/Host.inc b/llvm/lib/Support/Windows/Host.inc
index 461fb7833b8e..90a6fb316703 100644
--- a/llvm/lib/Support/Windows/Host.inc
+++ b/llvm/lib/Support/Windows/Host.inc
@@ -17,8 +17,8 @@
 
 using namespace llvm;
 
-static void updateTripleOSVersion(std::string &) {
-  // Do nothing.
+static std::string updateTripleOSVersion(std::string Triple) {
+  return Triple;
 }
 
 std::string sys::getDefaultTargetTriple() {