diff --git a/photon/libc/malloc/dlmalloc/malloc.c b/photon/libc/malloc/dlmalloc/malloc.c
index 2f7ba18..1423869 100644
--- a/photon/libc/malloc/dlmalloc/malloc.c
+++ b/photon/libc/malloc/dlmalloc/malloc.c
@@ -580,7 +580,9 @@ MAX_RELEASE_CHECK_RATE   default: 4095 unless not HAVE_MMAP
 #define LACKS_TIME_H
 #define LACKS_ERRNO_H
 #define LACKS_SCHED_H
-#define USE_LOCKS 0
+#define USE_LOCKS 1
+#define USE_SPIN_LOCKS 0
+#define USE_RECURSIVE_LOCKS 0
 #define MALLOC_FAILURE_ACTION
 
 extern void *__crt_heap_extend(size_t sz);
@@ -615,11 +617,6 @@ extern void *__crt_heap_extend(size_t sz);
 /* The maximum possible size_t value has all bits set */
 #define MAX_SIZE_T           (~(size_t)0)
 
-#ifndef USE_LOCKS /* ensure true if spin or recursive locks set */
-#define USE_LOCKS  ((defined(USE_SPIN_LOCKS) && USE_SPIN_LOCKS != 0) || \
-                    (defined(USE_RECURSIVE_LOCKS) && USE_RECURSIVE_LOCKS != 0))
-#endif /* USE_LOCKS */
-
 #if USE_LOCKS /* Spin locks for gcc >= 4.1, older gcc on x86, MSC >= 1310 */
 #if ((defined(__GNUC__) &&                                              \
       ((__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 1)) ||      \
@@ -2806,6 +2803,7 @@ static void reset_on_error(mstate m);
 
 #ifndef CORRUPTION_ERROR_ACTION
 #define CORRUPTION_ERROR_ACTION(m) ABORT
+
 #endif /* CORRUPTION_ERROR_ACTION */
 
 #ifndef USAGE_ERROR_ACTION