diff --git a/package/qt6/qt6base/Config.in b/package/qt6/qt6base/Config.in
index 7f3948ec27c6..6b48fd31facb 100644
--- a/package/qt6/qt6base/Config.in
+++ b/package/qt6/qt6base/Config.in
@@ -43,6 +43,17 @@ config BR2_PACKAGE_QT6BASE_GUI
 
 if BR2_PACKAGE_QT6BASE_GUI
 
+config BR2_PACKAGE_QT6BASE_CUSTOM_CONF_OPTS
+	string "Custom configuration options"
+	help
+	  Define custom qt6 configuration options which can be used to
+	  enable or disable options not managed by buildroot. These
+	  options are appended to the ones generated by buildroot and
+	  passed to qt6base during configuration.
+
+	  E.g. to disable mimetype handling, add the option
+	  -DQT_FEATURE_mimetype=OFF.
+
 config BR2_PACKAGE_QT6BASE_VULKAN
 	bool "Vulkan support"
 	depends on BR2_INSTALL_LIBSTDCPP # vulkan-loader
diff --git a/package/qt6/qt6base/qt6base.mk b/package/qt6/qt6base/qt6base.mk
index 51a4f1b5be7f..473fa7291ff0 100644
--- a/package/qt6/qt6base/qt6base.mk
+++ b/package/qt6/qt6base/qt6base.mk
@@ -426,6 +426,9 @@ else
 QT6BASE_CONF_OPTS += -DFEATURE_zstd=OFF
 endif
 
+# Must be last so can override all options set by Buildroot
+QT6BASE_CONF_OPTS += $(call qstrip,$(BR2_PACKAGE_QT6BASE_CUSTOM_CONF_OPTS))
+
 define QT6BASE_RM_USR_MKSPECS
 	$(Q)rm -rf $(TARGET_DIR)/usr/mkspecs
 endef