diff --git a/libraries/stdlib/api/js-v1/kotlin.time.kt b/libraries/stdlib/api/js-v1/kotlin.time.kt
index b5302034c9a..620b45c6640 100644
--- a/libraries/stdlib/api/js-v1/kotlin.time.kt
+++ b/libraries/stdlib/api/js-v1/kotlin.time.kt
@@ -363,6 +363,7 @@ public final inline class Duration : kotlin.Comparable<kotlin.time.Duration> {
         @kotlin.internal.InlineOnly
         public final val kotlin.Long.seconds: kotlin.time.Duration { get; }
 
+        @kotlin.time.ExperimentalTime
         public final fun convert(value: kotlin.Double, sourceUnit: kotlin.time.DurationUnit, targetUnit: kotlin.time.DurationUnit): kotlin.Double
 
         @kotlin.SinceKotlin(version = "1.5")
diff --git a/libraries/stdlib/api/js/kotlin.time.kt b/libraries/stdlib/api/js/kotlin.time.kt
index b5302034c9a..620b45c6640 100644
--- a/libraries/stdlib/api/js/kotlin.time.kt
+++ b/libraries/stdlib/api/js/kotlin.time.kt
@@ -363,6 +363,7 @@ public final inline class Duration : kotlin.Comparable<kotlin.time.Duration> {
         @kotlin.internal.InlineOnly
         public final val kotlin.Long.seconds: kotlin.time.Duration { get; }
 
+        @kotlin.time.ExperimentalTime
         public final fun convert(value: kotlin.Double, sourceUnit: kotlin.time.DurationUnit, targetUnit: kotlin.time.DurationUnit): kotlin.Double
 
         @kotlin.SinceKotlin(version = "1.5")
diff --git a/libraries/stdlib/src/kotlin/time/Duration.kt b/libraries/stdlib/src/kotlin/time/Duration.kt
index f2601ab678a..e557c26fb34 100644
--- a/libraries/stdlib/src/kotlin/time/Duration.kt
+++ b/libraries/stdlib/src/kotlin/time/Duration.kt
@@ -57,6 +57,7 @@ public value class Duration internal constructor(private val rawValue: Long) : C
         internal val NEG_INFINITE: Duration = durationOfMillis(-MAX_MILLIS)
 
         /** Converts the given time duration [value] expressed in the specified [sourceUnit] into the specified [targetUnit]. */
+        @ExperimentalTime
         public fun convert(value: Double, sourceUnit: DurationUnit, targetUnit: DurationUnit): Double =
             convertDurationUnit(value, sourceUnit, targetUnit)