diff --git a/include/mimalloc-types.h b/include/mimalloc-types.h
index 9c5d3c19..96e1860f 100644
--- a/include/mimalloc-types.h
+++ b/include/mimalloc-types.h
@@ -29,7 +29,7 @@ terms of the MIT license. A copy of the license can be found in the file
 // #define MI_SECURE 4  // checks for double free. (may be more expensive)
 
 #if !defined(MI_SECURE)
-#define MI_SECURE 4
+#define MI_SECURE 0
 #endif
 
 // Define MI_DEBUG for debug mode