diff --git a/Facepunch.Steamworks/Client/App.cs b/Facepunch.Steamworks/Client/App.cs
index 8cd6b82..f448bf3 100644
--- a/Facepunch.Steamworks/Client/App.cs
+++ b/Facepunch.Steamworks/Client/App.cs
@@ -73,6 +73,14 @@ namespace Facepunch.Steamworks
             return client.native.apps.BIsAppInstalled(appId);
         }
 
+        /// <summary>
+        /// Returns true if specified app is installed.
+        /// </summary>
+        public bool IsDlcInstalled( uint appId )
+        {
+            return client.native.apps.BIsDlcInstalled( appId );
+        }
+
         /// <summary>
         /// Returns the appid's name
         /// Returns error if the current app Id does not have permission to use this interface