diff -ruN xrdp-0.9.15-v/sesman/session.c xrdp-0.9.15/sesman/session.c
--- xrdp-0.9.15-v/sesman/session.c	2020-12-29 01:03:43.000000000 +1100
+++ xrdp-0.9.15/sesman/session.c	2020-12-29 10:31:37.895699198 +1100
@@ -33,10 +33,6 @@
 #include "config_ac.h"
 #endif
 
-#ifdef HAVE_SYS_PRCTL_H
-#include <sys/prctl.h>
-#endif
-
 #include "sesman.h"
 #include "libscp_types.h"
 #include "xauth.h"
@@ -668,20 +664,7 @@
 
                 if (type == SESMAN_SESSION_TYPE_XORG)
                 {
-#ifdef HAVE_SYS_PRCTL_H
-                    /*
-                     * Make sure Xorg doesn't run setuid root. Root access is not
-                     * needed. Xorg can fail when run as root and the user has no
-                     * console permissions.
-                     * PR_SET_NO_NEW_PRIVS requires Linux kernel 3.5 and newer.
-                     */
-                    if (prctl(PR_SET_NO_NEW_PRIVS, 1, 0, 0, 0) < 0)
-                    {
-                        LOG(LOG_LEVEL_WARNING,
-                            "Failed to disable setuid on X server: %s",
-                            g_get_strerror());
-                    }
-#endif
+                    char *setpriv = g_strdup("setpriv");
 
                     xserver_params = list_create();
                     xserver_params->auto_free = 1;
@@ -690,6 +673,8 @@
                     xserver = g_strdup((const char *)list_get_item(g_cfg->xorg_params, 0));
 
                     /* these are the must have parameters */
+                    list_add_item(xserver_params, (tintptr) setpriv);
+                    list_add_item(xserver_params, (tintptr) g_strdup("--no-new-privs"));
                     list_add_item(xserver_params, (tintptr) g_strdup(xserver));
                     list_add_item(xserver_params, (tintptr) g_strdup(screen));
                     list_add_item(xserver_params, (tintptr) g_strdup("-auth"));
@@ -713,7 +698,7 @@
                     g_setenv("XRDP_START_HEIGHT", geometry, 1);
 
                     /* fire up Xorg */
-                    g_execvp(xserver, pp1);
+                    g_execvp(setpriv, pp1);
                 }
                 else if (type == SESMAN_SESSION_TYPE_XVNC)
                 {