diff --git a/libcxx/include/string b/libcxx/include/string
index c676182fba8ba..e2be53eaee241 100644
--- a/libcxx/include/string
+++ b/libcxx/include/string
@@ -922,7 +922,7 @@ public:
       // Turning off ASan instrumentation for variable initialization with _LIBCPP_STRING_INTERNAL_MEMORY_ACCESS
       // does not work consistently during initialization of __r_, so we instead unpoison __str's memory manually first.
       // __str's memory needs to be unpoisoned only in the case where it's a short string.
-      : __r_(((__str.__is_long() ? 0 : (__str.__annotate_delete(), 0)), std::move(__str.__r_))) {
+      : __r_([](basic_string &__s){ if(!__s.__is_long()) __s.__annotate_delete(); return std::move(__s.__r_); }(__str)) {
     __str.__r_.first() = __rep();
     __str.__annotate_new(0);
     if (!__is_long())