diff --git a/iguana/iguana777.c b/iguana/iguana777.c
index c584169ae..797a49f54 100755
--- a/iguana/iguana777.c
+++ b/iguana/iguana777.c
@@ -525,6 +525,7 @@ int32_t iguana_utxogen(struct supernet_info *myinfo,struct iguana_info *coin,int
     if ( helperid == 0 )
     {
         coin->spendvectorsaved = (uint32_t)time(NULL);
+        coin->spendvalidated = 0;
         printf("%s UTXOGEN spendvectorsaved <- %u\n",coin->symbol,coin->spendvectorsaved);
     }
     else
@@ -571,12 +572,14 @@ void iguana_helper(void *arg)
         {
             if ( coin->spendvectorsaved == 1 )
                 iguana_utxogen(myinfo,coin,helperid,0);
-            else if ( coin->spendvectorsaved > 1 )
+            else if ( coin->spendvectorsaved > 1 && (coin->spendvalidated & (1 << helperid)) == 0 )
             {
                 printf("%s spendvectorsaved.%u helperid.%d validate\n",coin->symbol,coin->spendvectorsaved,helperid);
                 for (j=helperid; j<coin->bundlescount-1; j+=IGUANA_NUMHELPERS)
                     if ( (bp= coin->bundles[j]) != 0 )
                         iguana_bundlevalidate(coin,bp,0);
+                if ( helperid == 0 )
+                    coin->spendvalidated |= (1 << helperid);
                 printf("DONE %s spendvectorsaved.%u helperid.%d validate\n",coin->symbol,coin->spendvectorsaved,helperid);
             }
         }
diff --git a/iguana/iguana_spendvectors.c b/iguana/iguana_spendvectors.c
index 1dabcee8f..c0d8050da 100755
--- a/iguana/iguana_spendvectors.c
+++ b/iguana/iguana_spendvectors.c
@@ -970,6 +970,7 @@ int32_t iguana_spendvectorsaves(struct iguana_info *coin)
         }
     }
     coin->spendvectorsaved = (uint32_t)time(NULL);
+    coin->spendvalidated = 0;
     return(0);
 }
 
diff --git a/includes/iguana_structs.h b/includes/iguana_structs.h
index 987a4b64c..678aa0939 100755
--- a/includes/iguana_structs.h
+++ b/includes/iguana_structs.h
@@ -391,7 +391,7 @@ struct iguana_info
     int64_t mining,totalfees,TMPallocated,MAXRECVCACHE,MAXMEM,PREFETCHLAG,estsize,activebundles;
     int32_t MAXPEERS,MAXPENDINGREQUESTS,MAXBUNDLES,MAXSTUCKTIME,active,closestbundle,numemitted,lastsweep,numemit,startutc,newramchain,numcached,cachefreed,helperdepth,startPEND,endPEND,enableCACHE,RELAYNODE,VALIDATENODE,origbalanceswritten,balanceswritten,RTheight,RTdatabad;
     bits256 balancehash,allbundles;
-    uint32_t lastsync,parsetime,numiAddrs,lastpossible,bundlescount,savedblocks,backlog,spendvectorsaved,laststats,lastinv2,symbolcrc; char VALIDATEDIR[512];
+    uint32_t lastsync,parsetime,numiAddrs,lastpossible,bundlescount,savedblocks,backlog,spendvectorsaved,laststats,lastinv2,symbolcrc,spendvalidated; char VALIDATEDIR[512];
     int32_t longestchain,badlongestchain,longestchain_strange,RTramchain_busy,emitbusy,stuckiters,virtualchain;
     struct tai starttime; double startmillis;
     struct iguana_chain *chain;