diff --git a/src/Magnum/Trade/AbstractImporter.h b/src/Magnum/Trade/AbstractImporter.h
index ac27f2c66..100636593 100644
--- a/src/Magnum/Trade/AbstractImporter.h
+++ b/src/Magnum/Trade/AbstractImporter.h
@@ -31,6 +31,7 @@
 
 #include <Corrade/Containers/EnumSet.h>
 #include <Corrade/PluginManager/AbstractManagingPlugin.h>
+#include <Corrade/Utility/StlForwardString.h> /** @todo remove once file callbacks are <string>-free */
 
 #include "Magnum/Magnum.h"
 #include "Magnum/Trade/Trade.h"