diff --git a/iguana/iguana_notary.c b/iguana/iguana_notary.c
index 6435de521..c67a020a8 100755
--- a/iguana/iguana_notary.c
+++ b/iguana/iguana_notary.c
@@ -135,9 +135,9 @@ void dpow_srcupdate(struct supernet_info *myinfo,struct dpow_info *dp,int32_t he
         if ( OS_thread_create((void *)((uint64_t)&ptrs[5] + sizeof(struct dpow_checkpoint)),NULL,(void *)dpow_statemachinestart,(void *)ptrs) != 0 )
         {
         }
-        if ( ht > 100 )
+        if ( ht > 500 )
         {
-            for (i=ht-100; i>=0; i--)
+            for (i=ht-500; i>100; i--)
             {
                 if ( (i % 100) != 0 && (bp= dp->blocks[i]) != 0 && bp->state == 0xffffffff )
                 {