diff --git a/libc/bionic/malloc_debug_leak.c b/libc/bionic/malloc_debug_leak.c
index 316d5fe..4bcf8e5 100644
--- a/libc/bionic/malloc_debug_leak.c
+++ b/libc/bionic/malloc_debug_leak.c
@@ -66,7 +66,9 @@
 // stack trace functions
 // =============================================================================
 
-#define MALLOC_ALIGNMENT    8
+#ifndef MALLOC_ALIGNMENT
+#define MALLOC_ALIGNMENT    ((size_t)8U)
+#endif
 #define GUARD               0x48151642
 #define DEBUG               0