diff --git a/lib/Support/Unix/Threading.inc b/lib/Support/Unix/Threading.inc
index 34bc906..7369cff 100644
--- a/lib/Support/Unix/Threading.inc
+++ b/lib/Support/Unix/Threading.inc
@@ -206,7 +206,7 @@
 #if (defined(__GLIBC__) && defined(_GNU_SOURCE)) || defined(__ANDROID__)
 #if HAVE_PTHREAD_GETNAME_NP
   constexpr uint32_t len = get_max_thread_name_length_impl();
-  char Buffer[len];
+  char Buffer[len] = {'\0'};  // FIXME: working around MSan false positive.
   if (0 == ::pthread_getname_np(::pthread_self(), Buffer, len))
     Name.append(Buffer, Buffer + strlen(Buffer));
 #endif