diff --git a/config_help.txt b/config_help.txt
index 7b5da3fbeb1..fb37cbaed9e 100644
--- a/config_help.txt
+++ b/config_help.txt
@@ -293,7 +293,7 @@ Gui, printing, widget options:
     -kms ............... Enable backends for KMS [auto] (Linux only)
     -linuxfb ........... Enable Linux Framebuffer support [auto] (Linux only)
     -mirclient ......... Enable Mir client support [no] (Linux only)
-    -xcb ............... Select used xcb-* libraries [system/qt/no]
+    -xcb ............... Enable X11 support. Select used xcb-* libraries [system/qt/no]
                          (-qt-xcb still uses system version of libxcb itself)
 
   Input backends:
diff --git a/src/gui/configure.json b/src/gui/configure.json
index 582705f4023..89934c8f1d0 100644
--- a/src/gui/configure.json
+++ b/src/gui/configure.json
@@ -1830,8 +1830,7 @@ or may depend on your system and XQuartz setup."
             "condition": "features.gui && config.linux && !config.android && !features.xcb && !features.eglfs && !features.directfb && !features.linuxfb && !features.mirclient",
             "message": "No QPA platform plugin enabled! This will
 produce a Qt that cannot run GUI applications.
-The dependencies needed for xcb to build are listed in
-src/plugins/platforms/xcb/README"
+See \"Platform backends\" in the output of --help."
         },
         {
             "type": "warning",