diff --git a/src/geotag/timeline/TimeSpan.kt b/src/geotag/timeline/TimeSpan.kt
index 0c15294..fe47b17 100644
--- a/src/geotag/timeline/TimeSpan.kt
+++ b/src/geotag/timeline/TimeSpan.kt
@@ -4,7 +4,7 @@ import java.time.Duration
 import java.time.Duration.between
 import java.time.Instant
 
-class TimeSpan(val begin: Instant, val end: Instant) {
+data class TimeSpan(val begin: Instant, val end: Instant) {
   val duration: Duration get() = between(begin, end)
   fun matches(dateTime: Instant) = begin <= dateTime && end >= dateTime
 }
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