--- a/src/index/recollindex.cpp
+++ b/src/index/recollindex.cpp
@@ -42,6 +42,7 @@
 #include "smallut.h"
 #include "chrono.h"
 #include "pathut.h"
+#include "rclutil.h"
 #include "rclmon.h"
 #include "x11mon.h"
 #include "cancelcheck.h"