diff --git a/cockatrice/src/interface/deck_loader/deck_loader.h b/cockatrice/src/interface/deck_loader/deck_loader.h
index 2530b7f5d..c707c33dc 100644
--- a/cockatrice/src/interface/deck_loader/deck_loader.h
+++ b/cockatrice/src/interface/deck_loader/deck_loader.h
@@ -13,6 +13,7 @@
 #include <QPrinter>
 #include <QTextCursor>
 #include <libcockatrice/deck_list/deck_list.h>
+#include <optional>
 
 inline Q_LOGGING_CATEGORY(DeckLoaderLog, "deck_loader");
 
diff --git a/cockatrice/src/interface/pixel_map_generator.h b/cockatrice/src/interface/pixel_map_generator.h
index 61d771c79..36d1e45f3 100644
--- a/cockatrice/src/interface/pixel_map_generator.h
+++ b/cockatrice/src/interface/pixel_map_generator.h
@@ -12,6 +12,7 @@
 #include <QMap>
 #include <QPixmap>
 #include <libcockatrice/network/server/remote/user_level.h>
+#include <optional>
 
 inline Q_LOGGING_CATEGORY(PixelMapGeneratorLog, "pixel_map_generator");