diff --git a/Flow.Launcher.Plugin/Interfaces/IPublicAPI.cs b/Flow.Launcher.Plugin/Interfaces/IPublicAPI.cs
index 79be520a7..e67c844aa 100644
--- a/Flow.Launcher.Plugin/Interfaces/IPublicAPI.cs
+++ b/Flow.Launcher.Plugin/Interfaces/IPublicAPI.cs
@@ -297,6 +297,7 @@ namespace Flow.Launcher.Plugin
         /// Flow now supports assigning one action keyword to multiple plugins.
         /// This method is kept only for legacy Flow compatibility.
         /// </remarks>
+        [Obsolete("Flow now supports assigning one action keyword to multiple plugins. This method always returns false for compatibility.")]
         bool ActionKeywordAssigned(string actionKeyword);
 
         /// <summary>