diff --git a/src/plugins/qmldesigner/qmldesignerplugin.qbs b/src/plugins/qmldesigner/qmldesignerplugin.qbs
index 12ec273890e..3d8bf364e5e 100644
--- a/src/plugins/qmldesigner/qmldesignerplugin.qbs
+++ b/src/plugins/qmldesigner/qmldesignerplugin.qbs
@@ -431,6 +431,7 @@ Project {
                 "imagecache/imagecachegenerator.h",
                 "imagecache/imagecachestorageinterface.h",
                 "imagecache/imagecachestorage.h",
+                "imagecache/synchronousimagecache.cpp",
                 "imagecache/timestampproviderinterface.h",
                 "imagecache/timestampprovider.h",
                 "imagecache/timestampprovider.cpp",