diff --git a/lib/Basic/Targets.cpp b/lib/Basic/Targets.cpp
index d75aa3e0095..ab8578acea2 100644
--- a/lib/Basic/Targets.cpp
+++ b/lib/Basic/Targets.cpp
@@ -4138,6 +4138,7 @@ class CygwinX86_64TargetInfo : public X86_64TargetInfo {
       : X86_64TargetInfo(Triple) {
     TLSSupported = false;
     WCharType = UnsignedShort;
+    this->UserLabelPrefix = "";
   }
   void getTargetDefines(const LangOptions &Opts,
                         MacroBuilder &Builder) const override {