diff --git a/modules/mono/glue/GodotSharp/GodotSharp/Core/NativeInterop/Marshaling.cs b/modules/mono/glue/GodotSharp/GodotSharp/Core/NativeInterop/Marshaling.cs
index 93a83b701b73..0cc89d78af30 100644
--- a/modules/mono/glue/GodotSharp/GodotSharp/Core/NativeInterop/Marshaling.cs
+++ b/modules/mono/glue/GodotSharp/GodotSharp/Core/NativeInterop/Marshaling.cs
@@ -259,7 +259,7 @@ public static godot_callable ConvertCallableToNative(in Callable p_managed_calla
                 }
 
                 return new godot_callable(method /* Takes ownership of disposable */,
-                    p_managed_callable.Target.GetInstanceId());
+                    p_managed_callable.Target?.GetInstanceId() ?? 0);
             }
         }