diff --git a/Include/pyport.h b/Include/pyport.h
index 9d7ef006180..2ba81a4be42 100644
--- a/Include/pyport.h
+++ b/Include/pyport.h
@@ -572,6 +572,9 @@ extern "C" {
 #  if defined(__SANITIZE_ADDRESS__)
 #    define _Py_ADDRESS_SANITIZER
 #  endif
+#  if defined(__SANITIZE_THREAD__)
+#    define _Py_THREAD_SANITIZER
+#  endif
 #endif