-// Explicitly depend on tlssup.cc variable to bracket the list of TLS callbacks.
-extern "C" PIMAGE_TLS_CALLBACK __xl_a;
-extern "C" PIMAGE_TLS_CALLBACK __xl_z;
+// Explicitly depend on VC\crt\src\tlssup.c variables
+// to bracket the list of TLS callbacks.
+extern "C" PIMAGE_TLS_CALLBACK __xl_a, __xl_z;