diff --git a/src/gui/.prev_configure.cmake b/src/gui/.prev_configure.cmake
index 046f0e70aca..298906fa53c 100644
--- a/src/gui/.prev_configure.cmake
+++ b/src/gui/.prev_configure.cmake
@@ -1223,11 +1223,6 @@ qt_configure_add_report_entry(
     MESSAGE "Disabling X11 Accessibility Bridge: D-Bus or AT-SPI is missing."
     CONDITION QT_FEATURE_accessibility AND QT_FEATURE_xcb AND NOT QT_FEATURE_accessibility_atspi_bridge
 )
-qt_configure_add_report_entry(
-    TYPE WARNING
-    MESSAGE "The [-no]-qpa-platform-guard argument is deprecated and has no effect."
-    CONDITION ( NOT INPUT_qpa_platform_guard STREQUAL '' )
-)
 qt_configure_add_report_entry(
     TYPE WARNING
     MESSAGE "No QPA platform plugin enabled! This will produce a Qt that cannot run GUI applications.  See \"Platform backends\" in the output of --help."
diff --git a/src/gui/configure.cmake b/src/gui/configure.cmake
index 59146519115..f0b5d9b1fef 100644
--- a/src/gui/configure.cmake
+++ b/src/gui/configure.cmake
@@ -1286,11 +1286,6 @@ qt_configure_add_report_entry(
     MESSAGE "Disabling X11 Accessibility Bridge: D-Bus or AT-SPI is missing."
     CONDITION QT_FEATURE_accessibility AND QT_FEATURE_xcb AND NOT QT_FEATURE_accessibility_atspi_bridge
 )
-qt_configure_add_report_entry(
-    TYPE WARNING
-    MESSAGE "The [-no]-qpa-platform-guard argument is deprecated and has no effect."
-    CONDITION ( NOT INPUT_qpa_platform_guard STREQUAL '' )
-)
 qt_configure_add_report_entry(
     TYPE WARNING
     MESSAGE "No QPA platform plugin enabled! This will produce a Qt that cannot run GUI applications.  See \"Platform backends\" in the output of --help."
diff --git a/src/gui/configure.json b/src/gui/configure.json
index 32f1cd1b22f..a88ce543609 100644
--- a/src/gui/configure.json
+++ b/src/gui/configure.json
@@ -35,7 +35,6 @@
             "opengles3": "boolean",
             "openvg": "boolean",
             "qpa": { "type": "string", "name": "qpa_default_platform" },
-            "qpa-platform-guard": "boolean",
             "sm": { "type": "boolean", "name": "sessionmanager" },
             "tslib": "boolean",
             "vulkan": "boolean",
@@ -1708,11 +1707,6 @@
             "condition": "features.accessibility && features.xcb && !features.accessibility-atspi-bridge",
             "message": "Disabling X11 Accessibility Bridge: D-Bus or AT-SPI is missing."
         },
-        {
-            "type": "warning",
-            "condition": "input.qpa-platform-guard != ''",
-            "message": "The [-no]-qpa-platform-guard argument is deprecated and has no effect."
-        },
         {
             "type": "warning",
             "condition": "features.gui && config.linux && !config.android && !features.xcb && !features.eglfs && !features.directfb && !features.linuxfb",
diff --git a/src/gui/qt_cmdline.cmake b/src/gui/qt_cmdline.cmake
index cf8561eef86..3663a24a46c 100644
--- a/src/gui/qt_cmdline.cmake
+++ b/src/gui/qt_cmdline.cmake
@@ -25,7 +25,6 @@ qt_commandline_option(opengl-es-2 TYPE void NAME opengl VALUE es2)
 qt_commandline_option(opengles3 TYPE boolean)
 qt_commandline_option(openvg TYPE boolean)
 qt_commandline_option(qpa TYPE string NAME qpa_default_platform)
-qt_commandline_option(qpa-platform-guard TYPE boolean)
 qt_commandline_option(sm TYPE boolean NAME sessionmanager)
 qt_commandline_option(tslib TYPE boolean)
 qt_commandline_option(vulkan TYPE boolean)