diff --git a/orte/mca/rmaps/base/rmaps_base_map_job.c b/orte/mca/rmaps/base/rmaps_base_map_job.c
index be47ca221c..3e71bfe82a 100644
--- a/orte/mca/rmaps/base/rmaps_base_map_job.c
+++ b/orte/mca/rmaps/base/rmaps_base_map_job.c
@@ -441,12 +441,13 @@ void orte_rmaps_base_map_job(int fd, short args, void *cbdata)
                     {
                         hwloc_obj_t bd=NULL;;
 
+                        memset(tmp1, 0, 1024);
                         orte_get_attribute(&proc->attributes, ORTE_PROC_HWLOC_BOUND, (void**)&bd, OPAL_PTR);
                         if (NULL == bd) {
                             (void)strncpy(tmp1, "UNBOUND", strlen("UNBOUND"));
                         } else {
                             if (OPAL_ERR_NOT_BOUND == opal_hwloc_base_cset2mapstr(tmp1, sizeof(tmp1), node->topology, bd->cpuset)) {
-                            (void)strncpy(tmp1, "UNBOUND", strlen("UNBOUND"));
+                                (void)strncpy(tmp1, "UNBOUND", strlen("UNBOUND"));
                             }
                         }
                         opal_output(orte_clean_output, "\t\t<process rank=%s app_idx=%ld local_rank=%lu node_rank=%lu binding=%s>",