diff --git a/iguana/iguana_unspents.c b/iguana/iguana_unspents.c
index 8ff761c22..35ac85ac0 100755
--- a/iguana/iguana_unspents.c
+++ b/iguana/iguana_unspents.c
@@ -120,6 +120,11 @@ int32_t iguana_unspentindfind(struct supernet_info *myinfo,struct iguana_info *c
         unspentind = (tp->firstvout + vout);
     if ( coinaddr != 0 && unspentind > 0 && (hdrsi= *heightp/coin->chain->bundlesize) >= 0 && hdrsi < coin->bundlescount && (bp= coin->bundles[hdrsi]) != 0 && (rdata= bp->ramchain.H.data) != 0 && unspentind < rdata->numunspents )
     {
+        if ( bp->lastprefetch == 0 )
+        {
+            iguana_ramchain_prefetch(coin,&bp->ramchain,0);
+            bp->lastprefetch = (uint32_t)time(NULL);
+        }
         U = RAMCHAIN_PTR(rdata,Uoffset);
         P = RAMCHAIN_PTR(rdata,Poffset);
         pkind = U[unspentind].pkind;