diff --git a/cpp/core/Time.hpp b/cpp/core/Time.hpp
index df678d3e..e7cf5b09 100644
--- a/cpp/core/Time.hpp
+++ b/cpp/core/Time.hpp
@@ -43,7 +43,7 @@ constexpr Duration operator "" _us   (unsigned long long t) { return Duration(t*
 constexpr Duration operator "" _ms   (unsigned long long t) { return Duration(t*1'000'000); }
 constexpr Duration operator "" _sec  (unsigned long long t) { return Duration(t*1'000'000'000ull); }
 constexpr Duration operator "" _mins (unsigned long long t) { return Duration(t*1'000'000'000ull*60); }
-constexpr Duration operator "" _hours(unsigned long long t) { return Duration(t*1'000'000'00'000ull*60*60); }
+constexpr Duration operator "" _hours(unsigned long long t) { return Duration(t*1'000'000'000ull*60*60); }
 
 std::ostream& operator<<(std::ostream& out, Duration d);