diff --git a/libs/temporal/temporal/range.h b/libs/temporal/temporal/range.h
index fe76d1716a..49af6fe1ca 100644
--- a/libs/temporal/temporal/range.h
+++ b/libs/temporal/temporal/range.h
@@ -157,7 +157,7 @@ class LIBTEMPORAL_API Range {
 	 * extent semantics: 1 + (end - start)
 	 */
 
-	timecnt_t extent() const { return _start.distance (_end).increment(); }
+	timecnt_t length() const { return _start.distance (_end); }
 
 	RangeList subtract (RangeList &) const;