--- a/src/index/recollindex.cpp
+++ b/src/index/recollindex.cpp
@@ -40,6 +40,7 @@
 #include "rclinit.h"
 #include "indexer.h"
 #include "smallut.h"
+#include "chrono.h"
 #include "pathut.h"
 #include "rclmon.h"
 #include "x11mon.h"