@@ -623,7 +623,11 @@ void *mpool_malloc(struct MP *mp, size_t size) {

     struct FRAG *fold = f;

     mp->avail[sbits] = f->u.next.ptr;

     /* we always have enough space for this, align_increase ensured that */

-    f = (struct FRAG*)(alignto((unsigned long)f + FRAG_OVERHEAD, align)-FRAG_OVERHEAD);

+#ifdef _WIN64

+	f = (struct FRAG*)(alignto((unsigned long long)f + FRAG_OVERHEAD, align)-FRAG_OVERHEAD);

+#else

+	f = (struct FRAG*)(alignto((unsigned long)f + FRAG_OVERHEAD, align)-FRAG_OVERHEAD);

+#endif

     f->u.a.sbits = sbits;

     f->u.a.padding = (char*)f - (char*)fold;

 #ifdef CL_DEBUG