diff --git a/src/util/time.h b/src/util/time.h
index c75b1e94ed..4f9bde5d56 100644
--- a/src/util/time.h
+++ b/src/util/time.h
@@ -55,6 +55,7 @@ constexpr int64_t count_seconds(std::chrono::seconds t) { return t.count(); }
 constexpr int64_t count_milliseconds(std::chrono::milliseconds t) { return t.count(); }
 constexpr int64_t count_microseconds(std::chrono::microseconds t) { return t.count(); }
 
+using HoursDouble = std::chrono::duration<double, std::chrono::hours::period>;
 using SecondsDouble = std::chrono::duration<double, std::chrono::seconds::period>;
 
 /**