diff --git a/examples/button-clicker/Assets/DiscordController.cs b/examples/button-clicker/Assets/DiscordController.cs
index 98f584c..b9f0429 100644
--- a/examples/button-clicker/Assets/DiscordController.cs
+++ b/examples/button-clicker/Assets/DiscordController.cs
@@ -68,7 +68,7 @@ public class DiscordController : MonoBehaviour
         onSpectate.Invoke(secret);
     }
 
-    public void RequestCallback(DiscordRpc.JoinRequest request)
+    public void RequestCallback(ref DiscordRpc.JoinRequest request)
     {
         ++callbackCalls;
         Debug.Log(string.Format("Discord: join request {0}#{1}: {2}", request.username, request.discriminator, request.userId));
diff --git a/examples/button-clicker/Assets/DiscordRpc.cs b/examples/button-clicker/Assets/DiscordRpc.cs
index 541f853..d7570e0 100644
--- a/examples/button-clicker/Assets/DiscordRpc.cs
+++ b/examples/button-clicker/Assets/DiscordRpc.cs
@@ -18,7 +18,7 @@ public class DiscordRpc
     public delegate void SpectateCallback(string secret);
 
     [UnmanagedFunctionPointer(CallingConvention.Cdecl)]
-    public delegate void RequestCallback(JoinRequest request);
+    public delegate void RequestCallback(ref JoinRequest request);
 
     public struct EventHandlers
     {