@@ -936,6 +936,10 @@ redata_op_add(redata_t *redata, long insertpos, char *buf, long buflen, undostac

           || insertpos>redata_getused(redata)

           || (fromhere!=NULL && (fromhere!=&(redata->undostack) && fromhere!=&(redata->redostack))))

                 return(-1); /* sanity check failed */

+        if(insertpos==0 && redata->sizechunks==0) {

+                /* add the first chunk */

+                redata_preallocate(redata,buflen);

+        }

         if(redata_getposptr(redata,insertpos,&chunkno,&offset)==-1)

                 return(-1); /* invalid pos */

         if(fromhere!=&(redata->undostack)) {