- /* TIME_HALF is half of the number space of a Time type variable */
-#define TIME_HALF (Time)(1 << (sizeof(Time)*8-1))
+ /* TIME_HALF is not half of the number space of a Time type variable.
+ * Rather, it is half the number space of a timestamp value, which is
+ * always 32 bits. */
+#define TIME_HALF (guint32)(1 << 31)