diff --git a/qmake/library/qmakeevaluator.h b/qmake/library/qmakeevaluator.h
index 8b2fc3ef069..2cff82c164f 100644
--- a/qmake/library/qmakeevaluator.h
+++ b/qmake/library/qmakeevaluator.h
@@ -49,6 +49,7 @@
 #include "qmakeparser.h"
 #include "ioutils.h"
 
+#include <qiodevice.h>
 #include <qlist.h>
 #include <qlinkedlist.h>
 #include <qmap.h>