1 files changed, 2 insertions, 1 deletions
diff --git a/gcj_mlc.c b/gcj_mlc.c
index 50a99bf9..787a3c53 100644
--- a/gcj_mlc.c
+++ b/gcj_mlc.c
@@ -209,7 +209,8 @@ GC_API GC_ATTR_MALLOC void * GC_CALL GC_debug_gcj_malloc(size_t lb,
     /* confuse the backtrace.                                   */
     LOCK();
     maybe_finalize();
-    result = GC_generic_malloc_inner(lb + DEBUG_BYTES, GC_gcj_debug_kind);
+    result = GC_generic_malloc_inner(SIZET_SAT_ADD(lb, DEBUG_BYTES),
+                                     GC_gcj_debug_kind);
     if (result == 0) {
         GC_oom_func oom_fn = GC_oom_fn;
         UNLOCK();