diff --git a/common/kotlinx-coroutines-core-common/src/JobSupport.kt b/common/kotlinx-coroutines-core-common/src/JobSupport.kt
index 63bc6bb..b6d0b0e 100644
--- a/common/kotlinx-coroutines-core-common/src/JobSupport.kt
+++ b/common/kotlinx-coroutines-core-common/src/JobSupport.kt
@@ -429,10 +429,13 @@
         invokeOnCompletion(onCancelling = false, invokeImmediately = true, handler = handler)
 
     @Suppress("OverridingDeprecatedMember")
+    @Deprecated(message = "For binary compatibility", level = DeprecationLevel.HIDDEN)
     public final override fun invokeOnCompletion(handler: CompletionHandler, onCancelling: Boolean): DisposableHandle =
         invokeOnCompletion(onCancelling = onCancelling, invokeImmediately = true, handler = handler)
 
     @Suppress("OverridingDeprecatedMember")
+    @Deprecated(message = "Use with named `onCancellation` and `handler` parameters", level = DeprecationLevel.WARNING,
+        replaceWith = ReplaceWith("this.invokeOnCompletion(onCancellation = onCancelling_, handler = handler)"))
     public final override fun invokeOnCompletion(onCancelling_: Boolean, handler: CompletionHandler): DisposableHandle =
         invokeOnCompletion(onCancelling = onCancelling_, invokeImmediately = true, handler = handler)
 
@@ -878,6 +881,7 @@
     }
 
     @Suppress("OverridingDeprecatedMember")
+    @Deprecated(message = "Binary compatibility, it is an extension now", level = DeprecationLevel.HIDDEN)
     public final override fun cancelChildren(cause: Throwable?) {
         this.cancelChildren(cause) // use extension function
     }
diff --git a/common/kotlinx-coroutines-core-common/src/NonCancellable.kt b/common/kotlinx-coroutines-core-common/src/NonCancellable.kt
index 1d60aa4..8c12ae5 100644
--- a/common/kotlinx-coroutines-core-common/src/NonCancellable.kt
+++ b/common/kotlinx-coroutines-core-common/src/NonCancellable.kt
@@ -84,6 +84,7 @@
      */
     @Suppress("OverridingDeprecatedMember")
     @InternalCoroutinesApi
+    @Deprecated(message = "For binary compatibility", level = DeprecationLevel.HIDDEN)
     override fun invokeOnCompletion(handler: CompletionHandler, onCancelling: Boolean): DisposableHandle =
         NonDisposableHandle
 
@@ -93,6 +94,8 @@
      */
     @Suppress("OverridingDeprecatedMember")
     @InternalCoroutinesApi
+    @Deprecated(message = "Use with named `onCancellation` and `handler` parameters", level = DeprecationLevel.WARNING,
+        replaceWith = ReplaceWith("this.invokeOnCompletion(onCancellation = onCancelling_, handler = handler)"))
     override fun invokeOnCompletion(onCancelling_: Boolean, handler: CompletionHandler): DisposableHandle =
         NonDisposableHandle
 
@@ -140,5 +143,6 @@
      */
     @Suppress("OverridingDeprecatedMember")
     @InternalCoroutinesApi
+    @Deprecated(message = "Binary compatibility, it is an extension now", level = DeprecationLevel.HIDDEN)
     override fun cancelChildren(cause: Throwable?) {}
 }