diff --git a/src/blackmisc/valuecache.h b/src/blackmisc/valuecache.h
index f1a526ea8..f7e350c71 100644
--- a/src/blackmisc/valuecache.h
+++ b/src/blackmisc/valuecache.h
@@ -14,6 +14,7 @@
 
 #include "blackmisc/valuecacheprivate.h"
 #include "blackmisc/range.h"
+#include <QThread>
 
 namespace BlackMisc
 {