--- a/src/windows/qmkrecoll/librecoll.pro
+++ b/src/windows/qmkrecoll/librecoll.pro
@@ -79,6 +79,7 @@
 ../../unac/unac.cpp \
 ../../utils/appformime.cpp \
 ../../utils/base64.cpp \
+../../utils/chrono.cpp \
 ../../utils/circache.cpp \
 ../../utils/conftree.cpp \
 ../../utils/copyfile.cpp \