diff --git a/platform/platform-api/src/com/intellij/openapi/actionSystem/ex/ActionManagerEx.java b/platform/platform-api/src/com/intellij/openapi/actionSystem/ex/ActionManagerEx.java
index ae676194a64a..5423333f6f2b 100644
--- a/platform/platform-api/src/com/intellij/openapi/actionSystem/ex/ActionManagerEx.java
+++ b/platform/platform-api/src/com/intellij/openapi/actionSystem/ex/ActionManagerEx.java
@@ -93,6 +93,6 @@ public abstract class ActionManagerEx extends ActionManager {
    * Allows to receive notifications when popup menus created from action groups are shown and hidden.
    */
   @SuppressWarnings("unused")  // used in Rider
-  public abstract void addActionPopupMenuListener(ActionPopupMenuListener listener, Disposable parentDisposable);
+  public abstract void addActionPopupMenuListener(@NotNull ActionPopupMenuListener listener, @NotNull Disposable parentDisposable);
 }
 
diff --git a/platform/platform-impl/src/com/intellij/openapi/actionSystem/impl/ActionManagerImpl.java b/platform/platform-impl/src/com/intellij/openapi/actionSystem/impl/ActionManagerImpl.java
index d79b84a76dc2..cebecd04bf05 100644
--- a/platform/platform-impl/src/com/intellij/openapi/actionSystem/impl/ActionManagerImpl.java
+++ b/platform/platform-impl/src/com/intellij/openapi/actionSystem/impl/ActionManagerImpl.java
@@ -1130,7 +1130,7 @@ public final class ActionManagerImpl extends ActionManagerEx implements Disposab
   }
 
   @Override
-  public void addActionPopupMenuListener(ActionPopupMenuListener listener, Disposable parentDisposable) {
+  public void addActionPopupMenuListener(@NotNull ActionPopupMenuListener listener, @NotNull Disposable parentDisposable) {
     myActionPopupMenuListeners.add(listener);
     Disposer.register(parentDisposable, () -> myActionPopupMenuListeners.remove(listener));
   }