diff --git a/compose/ui/ui/src/commonMain/kotlin/androidx/compose/ui/Expect.kt b/compose/ui/ui/src/commonMain/kotlin/androidx/compose/ui/Expect.kt
index 776a68fdd41d6..2d24041618d0b 100644
--- a/compose/ui/ui/src/commonMain/kotlin/androidx/compose/ui/Expect.kt
+++ b/compose/ui/ui/src/commonMain/kotlin/androidx/compose/ui/Expect.kt
@@ -42,3 +42,5 @@ internal expect fun currentTimeMillis(): Long
 internal expect fun postDelayed(delayMillis: Long, block: () -> Unit): Any
 
 internal expect fun removePost(token: Any?)
+
+internal expect fun getCurrentThreadId(): Long