diff --git a/core/extension/gdextension_interface.cpp b/core/extension/gdextension_interface.cpp
index d1b4e6a30f2..e02e7aa701f 100644
--- a/core/extension/gdextension_interface.cpp
+++ b/core/extension/gdextension_interface.cpp
@@ -159,9 +159,7 @@ public:
 		userdata = p_info->callable_userdata;
 		token = p_info->token;
 
-		if (p_info->object != nullptr) {
-			object = ((Object *)p_info->object)->get_instance_id();
-		}
+		object = p_info->object_id;
 
 		call_func = p_info->call_func;
 		is_valid_func = p_info->is_valid_func;
diff --git a/core/extension/gdextension_interface.h b/core/extension/gdextension_interface.h
index 240da6e0738..d58f0226d81 100644
--- a/core/extension/gdextension_interface.h
+++ b/core/extension/gdextension_interface.h
@@ -392,7 +392,7 @@ typedef GDExtensionBool (*GDExtensionCallableCustomLessThan)(void *callable_user
 typedef void (*GDExtensionCallableCustomToString)(void *callable_userdata, GDExtensionBool *r_is_valid, GDExtensionStringPtr r_out);
 
 typedef struct {
-	/* Only `call_func` and `token` are strictly required, however, `object` should be passed if its not a static method.
+	/* Only `call_func` and `token` are strictly required, however, `object_id` should be passed if its not a static method.
 	 *
 	 * `token` should point to an address that uniquely identifies the GDExtension (for example, the
 	 * `GDExtensionClassLibraryPtr` passed to the entry symbol function.
@@ -409,7 +409,7 @@ typedef struct {
 	void *callable_userdata;
 	void *token;
 
-	GDExtensionObjectPtr object;
+	GDObjectInstanceID object_id;
 
 	GDExtensionCallableCustomCall call_func;
 	GDExtensionCallableCustomIsValid is_valid_func;