diff --git a/sxt/rdb.c b/sxt/rdb.c
index e39edf5..9f9bfd9 100644
--- a/sxt/rdb.c
+++ b/sxt/rdb.c
@@ -156,7 +156,7 @@ uint32_t sxtrdb_read_u64(sxtrdb_t *b, uint64_t *o)
 
   u = *((uint64_t *)(b->raw + b->curr));
   b->curr += sizeof(uint64_t);
-  *o = ntohl(u);
+  *o = ntohll(u);
 
   return sizeof(uint64_t);
 }
@@ -252,7 +252,7 @@ uint32_t sxtrdb_write_u64(sxtrdb_t *b, uint64_t uu)
     if(__rdb_grow(b, sizeof(uint64_t))) return 0;
   }
 
-  *(uint32_t *)(b->raw + b->ulength) = ntohll(uu);
+  *(uint64_t *)(b->raw + b->ulength) = ntohll(uu);
   b->ulength += sizeof(uint64_t);
 
   return sizeof(uint64_t);