diff --git a/src/main.cpp b/src/main.cpp
index e95b01368..4b14ae87c 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -5054,10 +5054,11 @@ bool AcceptBlock(int32_t *futureblockp,CBlock& block, CValidationState& state, C
             saplinght = Params().GetConsensus().vUpgrades[Consensus::UPGRADE_SAPLING].nActivationHeight;
         if ( saplinght < 0 )
             *futureblockp = 1;
+        // the problem is when a future sapling block comes in before we detected saplinght
         if ( saplinght > 0 && (tmpptr= chainActive.LastTip()) != 0 )
         {
             fprintf(stderr,"saplinght.%d tipht.%d blockht.%d cmp.%d\n",saplinght,(int32_t)tmpptr->GetHeight(),pindex->GetHeight(),pindex->GetHeight() < 0 || pindex->GetHeight() >= saplinght || (tmpptr->GetHeight() > saplinght-720 && tmpptr->GetHeight() < saplinht+720));
-            if ( pindex->GetHeight() < 0 || pindex->GetHeight() >= saplinght || (tmpptr->GetHeight() > saplinght-720 && tmpptr->GetHeight() < saplinht+720) )
+            if ( pindex->GetHeight() < 0 || pindex->GetHeight() >= saplinght || (tmpptr->GetHeight() > saplinght-720 && tmpptr->GetHeight() < saplinght+720) )
                 *futureblockp = 1;
         }
         if ( *futureblockp == 0 )