diff --git a/iguana/iguana_notary.c b/iguana/iguana_notary.c
index 5297e8bed..470077846 100755
--- a/iguana/iguana_notary.c
+++ b/iguana/iguana_notary.c
@@ -193,7 +193,7 @@ void dpow_srcupdate(struct supernet_info *myinfo,struct dpow_info *dp,int32_t he
     {
         //printf("%s/%s src ht.%d dest.%u nonz.%d %s minsigs.%d\n",dp->symbol,dp->dest,checkpoint.blockhash.height,dp->destupdated,bits256_nonz(checkpoint.blockhash.hash),bits256_str(str,dp->last.blockhash.hash),minsigs);
         dpow_heightfind(myinfo,dp,checkpoint.blockhash.height + 1000);
-        ptrs = calloc(1,sizeof(void *)*5 + sizeof(struct dpow_checkpoint) + sizeof(pthread_t));
+        ptrs = calloc(1,sizeof(void *)*5 + sizeof(struct dpow_checkpoint));
         ptrs[0] = (void *)myinfo;
         ptrs[1] = (void *)dp;
         ptrs[2] = (void *)(uint64_t)minsigs;
@@ -203,7 +203,7 @@ void dpow_srcupdate(struct supernet_info *myinfo,struct dpow_info *dp,int32_t he
         ptrs[4] = 0;
         memcpy(&ptrs[5],&checkpoint,sizeof(checkpoint));
         dp->activehash = checkpoint.blockhash.hash;
-        if ( OS_thread_create((void *)((uint64_t)&ptrs[5] + sizeof(struct dpow_checkpoint)),NULL,(void *)dpow_statemachinestart,(void *)ptrs) != 0 )
+        if ( OS_thread_create(malloc(sizeof(pthread_t)),NULL,(void *)dpow_statemachinestart,(void *)ptrs) != 0 )
         {
         }
     }