diff --git a/gradle.properties b/gradle.properties
index aeab7cf036..f92e982f5b 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -9,7 +9,7 @@ kotlin_version=1.4.20
 
 # Dependencies
 junit_version=4.12
-atomicfu_version=0.14.4
+atomicfu_version=0.15.1
 knit_version=0.2.3
 html_version=0.6.8
 lincheck_version=2.10
diff --git a/kotlinx-coroutines-core/api/kotlinx-coroutines-core.api b/kotlinx-coroutines-core/api/kotlinx-coroutines-core.api
index dcd837f7b2..d86f3f2cbb 100644
--- a/kotlinx-coroutines-core/api/kotlinx-coroutines-core.api
+++ b/kotlinx-coroutines-core/api/kotlinx-coroutines-core.api
@@ -861,10 +861,6 @@ public final class kotlinx/coroutines/debug/internal/DebugCoroutineInfo {
 	public final fun lastObservedStackTrace ()Ljava/util/List;
 }
 
-public synthetic class kotlinx/coroutines/debug/internal/DebugProbesImplSequenceNumberRefVolatile {
-	public fun <init> (J)V
-}
-
 public final class kotlinx/coroutines/debug/internal/DebuggerInfo : java/io/Serializable {
 	public fun <init> (Lkotlinx/coroutines/debug/internal/DebugCoroutineInfoImpl;Lkotlin/coroutines/CoroutineContext;)V
 	public final fun getCoroutineId ()Ljava/lang/Long;