diff --git a/core/extension/gdextension_interface.h b/core/extension/gdextension_interface.h
index 8b52c5e5e64..c917170cffb 100644
--- a/core/extension/gdextension_interface.h
+++ b/core/extension/gdextension_interface.h
@@ -415,6 +415,7 @@ typedef enum {
 	GDEXTENSION_METHOD_FLAG_VIRTUAL = 8,
 	GDEXTENSION_METHOD_FLAG_VARARG = 16,
 	GDEXTENSION_METHOD_FLAG_STATIC = 32,
+	GDEXTENSION_METHOD_FLAG_VIRTUAL_REQUIRED = 128,
 	GDEXTENSION_METHOD_FLAGS_DEFAULT = GDEXTENSION_METHOD_FLAG_NORMAL,
 } GDExtensionClassMethodFlags;