diff --git a/src/openrct2-ui/UiContext.Linux.cpp b/src/openrct2-ui/UiContext.Linux.cpp
index a854fae9a1..2692a85f8e 100644
--- a/src/openrct2-ui/UiContext.Linux.cpp
+++ b/src/openrct2-ui/UiContext.Linux.cpp
@@ -34,7 +34,7 @@ namespace OpenRCT2 { namespace Ui
         ZENITY,
     };
 
-    class LinuxContext : public IPlatformUiContext
+    class LinuxContext final : public IPlatformUiContext
     {
     private:
 
diff --git a/src/openrct2-ui/UiContext.cpp b/src/openrct2-ui/UiContext.cpp
index 3ff009bc37..8753b7a93f 100644
--- a/src/openrct2-ui/UiContext.cpp
+++ b/src/openrct2-ui/UiContext.cpp
@@ -51,7 +51,7 @@ using namespace OpenRCT2::Ui;
     #define KEYBOARD_PRIMARY_MODIFIER KMOD_CTRL
 #endif
 
-class UiContext : public IUiContext
+class UiContext final : public IUiContext
 {
 private:
     constexpr static uint32 TOUCH_DOUBLE_TIMEOUT = 300;