diff --git a/Include/pyport.h b/Include/pyport.h
index 30b9c8ebc409f0..e2bac3bf504261 100644
--- a/Include/pyport.h
+++ b/Include/pyport.h
@@ -757,6 +757,9 @@ extern char * _getpty(int *, int, mode_t, int);
 #  if defined(__SANITIZE_ADDRESS__)
 #    define _Py_ADDRESS_SANITIZER
 #  endif
+#  if defined(__SANITIZE_THREAD__)
+#    define _Py_THREAD_SANITIZER
+#  endif
 #endif