diff --git a/iguana/dpow/dpow_fsm.c b/iguana/dpow/dpow_fsm.c
index 5cf43414c..59bf29330 100755
--- a/iguana/dpow/dpow_fsm.c
+++ b/iguana/dpow/dpow_fsm.c
@@ -337,9 +337,9 @@ void dpow_statemachinestart(void *ptr)
     else if ( strcmp(dest->symbol,"KMD") == 0 )
     {
         kmdheight = dest->longestchain;
-        //portable_mutex_lock(&myinfo->MoM_mutex);
+        portable_mutex_lock(&myinfo->MoM_mutex);
         MoM = dpow_calcMoM(&MoMdepth,myinfo,src,checkpoint.blockhash.height);
-        //portable_mutex_unlock(&myinfo->MoM_mutex);
+        portable_mutex_unlock(&myinfo->MoM_mutex);
     }
     if ( (bp= dp->blocks[checkpoint.blockhash.height]) == 0 )
     {