diff --git a/src/platform/linux.c b/src/platform/linux.c
index 4df2a9806d..e47e9c5bef 100644
--- a/src/platform/linux.c
+++ b/src/platform/linux.c
@@ -154,7 +154,7 @@ utf8 *platform_open_directory_browser(utf8 *title)
 
 void platform_show_messagebox(char *message)
 {
-	STUB();
+	SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "OpenRCT2", message, gWindow);
 	log_verbose(message);
 }