diff --git a/compiler-rt/lib/tsan/CMakeLists.txt b/compiler-rt/lib/tsan/CMakeLists.txt
--- a/compiler-rt/lib/tsan/CMakeLists.txt
+++ b/compiler-rt/lib/tsan/CMakeLists.txt
@@ -16,7 +16,7 @@
 endif()
 
 # Add the actual runtime library.
-option(TSAN_USE_OLD_RUNTIME "Use the old tsan runtime (temporal option for emergencies)." ON)
+option(TSAN_USE_OLD_RUNTIME "Use the old tsan runtime (temporal option for emergencies)." OFF)
 if (TSAN_USE_OLD_RUNTIME)
   add_subdirectory(rtl-old)
 else()