diff --git a/iguana/iguana_ramchain.c b/iguana/iguana_ramchain.c
index 05b57dca5..df1896315 100755
--- a/iguana/iguana_ramchain.c
+++ b/iguana/iguana_ramchain.c
@@ -2228,7 +2228,14 @@ int64_t iguana_ramchainopen(struct iguana_info *coin,struct iguana_ramchain *ram
     numunspents *= 2.5, numspends *= 2.5, numpkinds *= 2.5;
     if ( mem->ptr == 0 )
     {
-        allocsize = _iguana_rdata_action(0,0,0,0,1,numtxids,numunspents,numspends,numpkinds,numexternaltxids,scriptspace,0,0,0,0,0,RAMCHAIN_ARG,numblocks);
+        while ( (allocsize= _iguana_rdata_action(0,0,0,0,1,numtxids,numunspents,numspends,numpkinds,numexternaltxids,scriptspace,0,0,0,0,0,RAMCHAIN_ARG,numblocks)) > 1024L*1024L*1024L )
+        {
+            numtxids *= .9;
+            numunspents *= .9;
+            numspends *= .9;
+            numpkinds *= .9;
+            numexternaltxids *= .9;
+        }
         iguana_meminit(mem,coin->symbol,0,allocsize + 65536*3,0);
     }
     if ( hashmem->ptr == 0 )