diff --git a/src/backends/x11/meta-monitor-manager-xrandr.c b/src/backends/x11/meta-monitor-manager-xrandr.c
index 86ce344ee..f8284a066 100644
--- a/src/backends/x11/meta-monitor-manager-xrandr.c
+++ b/src/backends/x11/meta-monitor-manager-xrandr.c
@@ -186,7 +186,7 @@ output_get_backlight_xrandr (MetaMonitorManagerXrandr *manager_xrandr,
 
   XRRGetOutputProperty (manager_xrandr->xdisplay,
                         (XID)output->output_id,
-                        display->atom_BACKLIGHT,
+                        display->atom_Backlight,
                         0, G_MAXLONG, False, False, XA_INTEGER,
                         &actual_type, &actual_format,
                         &nitems, &bytes_after, &buffer);
@@ -211,7 +211,7 @@ output_get_backlight_limits_xrandr (MetaMonitorManagerXrandr *manager_xrandr,
   meta_error_trap_push (display);
   info = XRRQueryOutputProperty (manager_xrandr->xdisplay,
                                  (XID)output->output_id,
-                                 display->atom_BACKLIGHT);
+                                 display->atom_Backlight);
   meta_error_trap_pop (display);
 
   if (info == NULL)
@@ -947,7 +947,7 @@ meta_monitor_manager_xrandr_change_backlight (MetaMonitorManager *manager,
   meta_error_trap_push (display);
   XRRChangeOutputProperty (manager_xrandr->xdisplay,
                            (XID)output->output_id,
-                           display->atom_BACKLIGHT,
+                           display->atom_Backlight,
                            XA_INTEGER, 32, PropModeReplace,
                            (unsigned char *) &hw_value, 1);
   meta_error_trap_pop (display);
diff --git a/src/meta/atomnames.h b/src/meta/atomnames.h
index 38227deaa..46e1a664e 100644
--- a/src/meta/atomnames.h
+++ b/src/meta/atomnames.h
@@ -78,7 +78,7 @@ item(MULTIPLE)
 item(TIMESTAMP)
 item(VERSION)
 item(ATOM_PAIR)
-item(BACKLIGHT)
+item(Backlight)
 item(_XKB_RULES_NAMES)
 item(hotplug_mode_update)
 item(WL_SURFACE_ID)