diff --git a/platform/platform-api/src/com/intellij/ide/actions/ContextHelpAction.java b/platform/platform-api/src/com/intellij/ide/actions/ContextHelpAction.java
index ebaf3af3f8f9..900af9791db0 100644
--- a/platform/platform-api/src/com/intellij/ide/actions/ContextHelpAction.java
+++ b/platform/platform-api/src/com/intellij/ide/actions/ContextHelpAction.java
@@ -34,7 +34,7 @@ public class ContextHelpAction extends AnAction implements DumbAware {
     this(null);
   }
 
-  public ContextHelpAction(@NonNls String helpID) {
+  public ContextHelpAction(@NonNls @Nullable String helpID) {
     myHelpID = helpID;
   }