diff --git a/src/komodo_ccdata.h b/src/komodo_ccdata.h
index 675420c94..70e601946 100644
--- a/src/komodo_ccdata.h
+++ b/src/komodo_ccdata.h
@@ -45,7 +45,7 @@ bits256 iguana_merkle(bits256 *tree,int32_t txn_count)
 uint256 komodo_calcMoM(int32_t height,int32_t MoMdepth)
 {
     static uint256 zero; bits256 MoM,*tree; CBlockIndex *pindex; int32_t i;
-    tree = (bits256 *)calloc(MoMdepth,sizeof(*tree));
+    tree = (bits256 *)calloc(MoMdepth * 3,sizeof(*tree));
     for (i=0; i<MoMdepth; i++)
     {
         if ( (pindex= komodo_chainactive(height - i)) != 0 )