diff --git a/3party/opening_hours/osm_time_range.cpp b/3party/opening_hours/osm_time_range.cpp
index 40428e3ca3..7d663864a5 100644
--- a/3party/opening_hours/osm_time_range.cpp
+++ b/3party/opening_hours/osm_time_range.cpp
@@ -927,7 +927,7 @@ OSMTimeRange & OSMTimeRange::operator () (time_t timestamp)
 
 OSMTimeRange & OSMTimeRange::operator () (std::string const & timestr, char const * timefmt)
 {
-  std::tm when = {0};
+  std::tm when = {};
   std::stringstream ss(timestr);
   ss >> std::get_time(&when, timefmt);
   return this->operator()(std::mktime(&when));