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--- a/src/rcldb/rclabstract.cpp
+++ b/src/rcldb/rclabstract.cpp
@@ -29,6 +29,7 @@
 #include "searchdata.h"
 #include "utf8iter.h"
 #include "hldata.h"
+#include "chrono.h"
 
 using namespace std;