diff --git a/clang/lib/Headers/tgmath.h b/clang/lib/Headers/tgmath.h
index f64f117d2f26bf1482a801a18088fbef4831edb2..e1a00236781a232c8c72b682e5d588949c77ccaa 100644
--- a/clang/lib/Headers/tgmath.h
+++ b/clang/lib/Headers/tgmath.h
@@ -38,7 +38,7 @@
 // promotion
 
 typedef void _Argument_type_is_not_arithmetic;
-static _Argument_type_is_not_arithmetic __tg_promote(...) \
+static _Argument_type_is_not_arithmetic __tg_promote(...)
   __attribute__((__unavailable__,__overloadable__));
 static double               _TG_ATTRSp __tg_promote(int);
 static double               _TG_ATTRSp __tg_promote(unsigned int);