diff --git a/ps/display.c b/ps/display.c
index 1927fd6..e7ab351 100644
--- a/ps/display.c
+++ b/ps/display.c
@@ -357,7 +357,7 @@ static void simple_spew(void){
   if (selection_list && selection_list->typecode == SEL_PID_QUICK) {
     flags |= PROC_PID;
 
-    pidlist = (pid_t*) malloc(selection_list->n * sizeof(pid_t));
+    pidlist = (pid_t*) malloc((selection_list->n + 1) * sizeof(pid_t));
     if (!pidlist) {
       fprintf(stderr, _("error: not enough memory\n"));
       exit(1);
@@ -366,6 +366,9 @@ static void simple_spew(void){
     for (i = 0; i < selection_list->n; i++) {
       pidlist[i] = selection_list->u[selection_list->n-i-1].pid;
     }
+
+    // delimit the array with nul object (0); RHBZ#2153813
+    pidlist[selection_list->n] = (pid_t)0;
   }
 
   ptp = openproc(flags, pidlist);