diff --git a/app/src/main.cpp b/app/src/main.cpp
index 4266bfd..1e3bb83 100644
--- a/app/src/main.cpp
+++ b/app/src/main.cpp
@@ -16,6 +16,7 @@ auto run(int const argc, char const* const* argv) -> int {
 		klib::args::named_option(engineCI.assetsDir, "a,assets", "override assets directory"),
 		klib::args::named_option(engineCI.prefsPath, "p,prefs", "path to custom prefs JSON"),
 		klib::args::named_flag(engineCI.noLibdecor, "no-libdecor", "disable libdecor (ignored unless Wayland)"),
+		klib::args::named_flag(engineCI.forceX11, "force-x11", "force X11"),
 	};
 	auto const parseResult = klib::args::parse_main(parseInfo, args, argc, argv);
 	if (parseResult.early_return()) {
diff --git a/lib/include/chomper/engine.hpp b/lib/include/chomper/engine.hpp
index 509339c..f38fb52 100644
--- a/lib/include/chomper/engine.hpp
+++ b/lib/include/chomper/engine.hpp
@@ -18,6 +18,7 @@ class Engine : public IDebugInspector, public klib::Pinned {
 		std::string_view assetsDir{};
 		std::string_view prefsPath{};
 		bool noLibdecor{};
+		bool forceX11{};
 	};
 
 	using CreateRuntime = std::move_only_function<std::unique_ptr<IRuntime>(Engine&)>;
diff --git a/lib/src/engine.cpp b/lib/src/engine.cpp
index 93ba873..de52ee2 100644
--- a/lib/src/engine.cpp
+++ b/lib/src/engine.cpp
@@ -111,6 +111,9 @@ void Engine::createContext(CreateInfo const& createInfo) {
 		if (createInfo.noLibdecor) {
 			ret |= le::PlatformFlag::NoLibdecor;
 		}
+		if (createInfo.forceX11) {
+			ret |= le::PlatformFlag::ForceX11;
+		}
 		return ret;
 	}();
 	auto const windowTitle = std::format("chomper {}", buildVersionStr);