diff --git a/src/platform/qt/LibraryModel.h b/src/platform/qt/LibraryModel.h
index 6f99a474e..dd017e014 100644
--- a/src/platform/qt/LibraryModel.h
+++ b/src/platform/qt/LibraryModel.h
@@ -12,6 +12,8 @@
 
 #include <mgba/core/library.h>
 
+#include <functional>
+
 struct VDir;
 struct VFile;