diff --git a/src/algorithms/PVT/libs/hybrid_ls_pvt.cc b/src/algorithms/PVT/libs/hybrid_ls_pvt.cc
index 25898e195..ede8a9f83 100644
--- a/src/algorithms/PVT/libs/hybrid_ls_pvt.cc
+++ b/src/algorithms/PVT/libs/hybrid_ls_pvt.cc
@@ -33,6 +33,7 @@
 #include "Galileo_E1.h"
 #include "GPS_L1_CA.h"
 #include "GPS_L2C.h"
+#include <boost/date_time/posix_time/posix_time.hpp>
 #include <glog/logging.h>