diff --git a/src/init.c b/src/init.c
index 0f4d4f40..565cffd9 100644
--- a/src/init.c
+++ b/src/init.c
@@ -527,11 +527,14 @@ void mi_process_init(void) mi_attr_noexcept {
   mi_detect_cpu_features();
   _mi_os_init();
   mi_heap_main_init();
-  #if (MI_DEBUG)
+  #if MI_DEBUG
   _mi_verbose_message("debug level : %d\n", MI_DEBUG);
   #endif
   _mi_verbose_message("secure level: %d\n", MI_SECURE);
   _mi_verbose_message("mem tracking: %s\n", MI_TRACK_TOOL);
+  #if MI_TSAN
+  _mi_verbose_message("thread santizer enabled\n");
+  #endif
   mi_thread_init();
 
   #if defined(_WIN32)