diff --git a/libraries/shared/src/NumericalConstants.h b/libraries/shared/src/NumericalConstants.h
index ca18d8ad5e..d37e1e31c5 100644
--- a/libraries/shared/src/NumericalConstants.h
+++ b/libraries/shared/src/NumericalConstants.h
@@ -39,6 +39,9 @@ const quint64 NSECS_PER_MSEC = 1000000;
 const quint64 USECS_PER_MSEC = 1000;
 const quint64 MSECS_PER_SECOND = 1000;
 const quint64 USECS_PER_SECOND = USECS_PER_MSEC * MSECS_PER_SECOND;
+const quint64 SECS_PER_MINUTE = 60;
+const quint64 MINS_PER_HOUR = 60;
+const quint64 SECS_PER_HOUR = SECS_PER_MINUTE * MINS_PER_HOUR;
 
 const int BITS_IN_BYTE = 8;
 const int BYTES_PER_KILOBYTE = 1000;